- 1289 (number)
The number

**1289 (one thousand two hundred eighty-nine)**is thenatural number following 1288 and preceding 1290. "Number Gossip: 1289", March 2008, webpage: [*http://www.numbergossip.com/1289 Numbergossip-1289*] .]**In mathematics**The number 1289 is an odd

prime number , following 1283 and preceding 1291. It is classified as anapocalyptic power , deficient, and an evil number:* The number 1289 is called an apocalyptic power because 2

^{1289}contains the consecutive digits 666 (in decimal): in the sequence ..., 1281, 1285, 1286, 1289, 1290, 1298, 1301, etc.* The number 1289 is classed as deficient 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 evil 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 cells in flat side-by-side format with brass-strip connections, also known as MN1203, 3LR12 and many other "R12" variations.

**Historical years*** 1289 AD,

1289 BC .**Notes**

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