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102 (number)

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102
  
103 →

Factorization
  
2 × 3 × 17

Cardinal
  
one hundred two

Roman numeral
  
CII

Ordinal
  
102nd (one hundred and second)

Divisors
  
1, 2, 3, 6, 17, 34, 51, 102

102 (one hundred [and] two) is the natural number following 101 and preceding 103.

Contents

In mathematics

102 is an abundant number and semiperfect number. It is a sphenic number. It is the sum of four consecutive prime numbers (19 + 23 + 29 + 31).

The sum of Euler's totient function φ(x) over the first eighteen integers is 102.

102 is the third base 10 polydivisible number, since 1 is divisible by 1, 10 is divisible by 2 and 102 is divisible by 3. This also shows that 102 is a Harshad number. 102 is the first 3-digit number divisible by the numbers 3, 6, 17, 34 and 51.

In science

  • The atomic number of nobelium, an actinide.

    • In other fields

    102 is also:

  • The emergency telephone number for police in Ukraine and Belarus
  • The emergency telephone number for fire in Israel
  • The emergency telephone number for ambulance in parts of India

    • References

    102 (number) Wikipedia
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