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1289 (number)

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← 1288
  
1289

Factorization
  
1289

1289
  
1290 →

Prime
  
yes

Cardinal
  
one thousand two hundred eighty-nine

Ordinal
  
1289th (one thousand two hundred and eighty-ninth)

The number 1289 (twelve hundred eighty-nine) is the natural number following 1288 and preceding 1290.

Contents

In mathematics

The number 1289 is an odd prime number, following 1283 and preceding 1291. It is classified as an apocalyptic power, a deficient number, and an evil number:

  • The number 1289 is called an apocalyptic power because 21289 contains the consecutive digits 666 (in decimal), as the Number of the Beast: in the sequence ..., 1281, 1285, 1286, 1289, 1290, 1298, 1301, etc.
  • The number 1289 is classed as a deficient number because the sum of all its positive divisors (except itself) totals less than 1289. Compare with perfect and abundant numbers.
  • The number 1289 is classed as an evil number because it has an even number of 1's contained in its binary expansion.

    • In technology

  • 1289 is a 4.5 volt battery with 3 "B Size" cells in flat side-by-side format with brass-strip connections, also known as MN1203, 3LR12 and many other IEC "R12" variations. Used in Rear cycle lamps, hand torches and in pairs in many Continental European Radio models.

    • Historical years

  • 1289 AD, 1289 BC.

    • References

    1289 (number) Wikipedia
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