1289 (number)
Natural number
From Wikipedia, the free encyclopedia
The number 1289 (twelve hundred eighty-nine) is the natural number following 1288 and preceding 1290.[1]
Cardinalone thousand two hundred eighty-nine
Ordinal1289th
(one thousand two hundred eighty-ninth)
(one thousand two hundred eighty-ninth)
Primeyes
| ||||
|---|---|---|---|---|
| Cardinal | one thousand two hundred eighty-nine | |||
| Ordinal | 1289th (one thousand two hundred eighty-ninth) | |||
| Factorization | prime | |||
| Prime | yes | |||
| Greek numeral | ,ÎΣΠδ | |||
| Roman numeral | MCCLXXXIX, mcclxxxix | |||
| Binary | 101000010012 | |||
| Ternary | 12022023 | |||
| Senary | 55456 | |||
| Octal | 24118 | |||
| Duodecimal | 8B512 | |||
| Hexadecimal | 50916 | |||
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 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 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.
