One hundred thousand (100,000) is the natural number following 99,999 and preceding 100,001. In scientific notation, it is written as 105.
In India, Pakistan and South Asia, one hundred thousand is called a lakh, and is written as 1,00,000. The Thai, Lao, Khmer and Vietnamese languages also have separate words for this number: แสน, ແສນ, សែន [saen] and ức respectively. No other major language has a special word for this number, preferring to refer to it as a multiple of smaller numbers.
In astronomy, 100,000 metres, 100 kilometres, or 100 km (62 miles) is the altitude at which the Fédération Aéronautique Internationale (FAI) defines spaceflight to begin.
In the Irish Language, céad míle fáilte (pronounced: Irish pronunciation: [ceːd̪ˠ ˈmʲiːlʲə ˈfˠaːlʲtʲə]) is a popular greeting meaning "A Hundred Thousand Welcomes".
100003 – smallest 6-digit prime number
100255 – Friedman number
101101 – smallest palindromic Carmichael number
101723 – smallest prime number whose square is a pandigital number containing each digit from 0 to 9
102564 – The smallest parasitic number
103680 – highly totient number
103769 – the number of combinatorial types of 5-dimensional parallelohedra
103823 – nice Friedman number
104723 – the 9,999th prime number
104729 – the 10,000th prime number
104869 – the smallest prime number containing every non-prime digit.
105664 – harmonic divisor number
110880 – highly composite number
111111 – repunit
111777 – smallest natural number requiring 17 syllables in American English, 19 in British English
113634 – Motzkin number for n = 14
114689 – prime factor of F12
115975 – Bell number
116281 = 341^2 square number, centered decagonal number, 18-gon number.
117067 – first prime vampire number
117649 = 76
117800 – harmonic divisor number
120284 – Keith number
120960 – highly totient number
121393 – Fibonacci number
124000 – number of Islamic prophets
127777 – smallest natural number requiring 18 syllables in American English, 20 in British English
127912 – Wedderburn–Etherington number
128981 – Starts the first prime gap sequence of 2, 4, 6, 8, 10, 12, 14
129106 – Keith number
131071 – Mersenne prime
131072 = 217
131361 – Leyland number
134340 – Pluto's minor planet designation
135137 – Markov number
142129 = 3772, square number, dodecagonal number
142857 – Kaprekar number, Harshad number smallest cyclic number in decimal.
144000 – number with religious significance
147640 – Keith number
148149 – Kaprekar number
156146 – Keith number
161051 = 115
161280 – highly totient number
166320 – highly composite number
167400 – harmonic divisor number
173600 – harmonic divisor number
174680 – Keith number
174763 – Wagstaff prime
177147 = 311
177777 – smallest natural number requiring 19 syllables in American English, 21 in British English
178478 – Leyland number
181440 – highly totient number
181819 – Kaprekar number
183186 – Keith number
187110 – Kaprekar number
195025 – Pell number, Markov number
196418 – Fibonacci number, Markov number
196883 – the dimension of the smallest nontrivial irreducible representation of the Monster group
196884 – the coefficient of q in the Fourier series expansion of the j-invariant. The adjacency of 196883 and 196884 was important in suggesting monstrous moonshine.
206265 – number of arc seconds in a radian (see also parsec)
207360 – highly totient number
208012 – Catalan number
208335 – the largest number to be both triangular and square pyramidal
208495 – Kaprekar number
221760 – highly composite number
222222 – repdigit
237510 – harmonic divisor number
241920 – highly totient number
242060 – harmonic divisor number
248832 – the smallest fifth power that can be represented as the sum of only 6 fifth powers.
261119 – Carol number
262144 = 218; exponential factorial of 4; a superperfect number
262468 – Leyland number
263167 – Kynea number
268705 – Leyland number
274177 – prime factor of F6
277200 – highly composite number
279936 = 67
280859 – a six-digit prime number whose square (algebra) is tridigital.
293547 – Wedderburn–Etherington number
294685 – Markov number
298320 – Keith number
310572 – Motzkin number
317811 – Fibonacci number
318682 – Kaprekar number
326981 – alternating factorial
329967 – Kaprekar number
332640 – highly composite number; harmonic divisor number
333333 – repdigit
333667 – sexy prime and unique prime
333673 – sexy prime
333679 – sexy prime
351352 – Kaprekar number
355419 – Keith number
356643 – Kaprekar number
360360 – harmonic divisor number; the smallest number divisible by all of the numbers 1 through 15
362880 = 9!, highly totient number
370261 – first prime followed by a prime gap of over 100
371293 = 135
389305 – self-descriptive number in base 7
390313 – Kaprekar number
390625 = 58
397585 – Leyland number
409113 – sum of the first nine factorials
422481 – smallest number whose fourth power is the sum of three smaller fourth powers
423393 – Leyland number
426389 – Markov number
437760 to 440319 – any of these numbers will cause the Apple ][+ and Apple //e computers to crash to a monitor prompt when entered at the Basic prompt, due to a short-cut in the Applesoft code programming of the overflow test when evaluating 16 bit numbers. Entering 440000 at the prompt has been used to hack games that are protected against entering commands at the prompt after the game is loaded.
444444 – repdigit
461539 – Kaprekar number
466830 – Kaprekar number
470832 – Pell number
483840 – highly totient number
498960 – highly composite number
499393 – Markov number
499500 – Kaprekar number
500500 – Kaprekar number, sum of first 1000 integers
509203 – Riesel number
510510 – the product of the first seven prime numbers, thus the seventh primorial
514229 – Fibonacci prime, Markov number
524287 – Mersenne prime
524288 = 219, power of two
524649 – Leyland number
531441 = 312
533169 – Leyland number
533170 – Kaprekar number
539400 – harmonic divisor number
548834 – equal to the sum of the sixth powers of its digits
554400 – highly composite number
555555 – repdigit
604800 – number of seconds in a week
646018 – Markov number
665280 – highly composite number
666666 – repdigit
676157 – Wedderburn–Etherington number
678570 – Bell number
694280 – Keith number
695520 – harmonic divisor number
720720 – superior highly composite number; colossally abundant number; the smallest number divisible by all the numbers 1 through 16
725760 – highly totient number
726180 – harmonic divisor number
742900 – Catalan number
753480 – harmonic divisor number
765623 – emirp, Friedman number 56 × 72 − 6 ÷ 3
777777 – repdigit, smallest natural number requiring 20 syllables in American English, 22 in British English
823543 = 77
832040 – Fibonacci number
853467 – Motzkin number
873612 – 11 + 22 + 33 + 44 + 55 + 66 + 77
888888 – repdigit
925765 – Markov number
925993 – Keith number
950976 – harmonic divisor number
967680 – highly totient number
999983 – largest 6-digit prime number
999999 – repdigit. The divisibility of this number by 7 and by 13 accounts for the fact that rational numbers with those denominators have 6-digit repetends when expressed in decimal form.
