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|Cardinal||one thousand two hundred eighty-nine|
(one thousand two hundred and eighty-ninth)
- 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.
- 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.