1289 (number)

← 1288

1289

1290 →

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Cardinal

one thousand two hundred eighty-nine

Ordinal

1289th
(one thousand two hundred eighty-ninth)

yes

MCCLXXXIX

10100001001₂

1202202₃

110021₄

20124₅

5545₆

2411₈

8B5₁₂

509₁₆

349₂₀

ZT₃₆

The number 1289 (twelve hundred eighty-nine) is the natural number following 1288 and preceding 1290.^[1]

In mathematics

The number 1289 is an odd prime number, following 1283 and preceding 1291.^[1] It is classified as an apocalyptic power, a deficient number, and an evil number:^[1]

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.^[1]^[2]

The number 1289 is classed as a deficient number because the sum of all its positive divisors (except itself) totals less than 1289.^[1] 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.^[1]

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.

Notes

1 2 3 4 5 6 "Number Gossip: 1289", March 2008, webpage: Numbergossip-1289.
↑ "Apocalyptic Number -- from Wolfram MathWorld", Mathworld.Wolfram.com, August 2010, webpage: MW-Apoc.

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