7825
Natural number
From Wikipedia, the free encyclopedia
7825 (seven thousand, eight hundred [and] twenty-five) is the natural number following 7824 and preceding 7826.
Cardinalseven thousand, eight hundred [and] twenty-five
Ordinal7825th
Factorization52 × 313
Divisors1, 5, 25, 313, 1565, 7825
| ||||
|---|---|---|---|---|
| Cardinal | seven thousand, eight hundred [and] twenty-five | |||
| Ordinal | 7825th | |||
| Factorization | 52 × 313 | |||
| Divisors | 1, 5, 25, 313, 1565, 7825 | |||
| Greek numeral | ,ΖΩΚΕ´ | |||
| Roman numeral | VMMDCCCXXV, or VIIDCCCXXV | |||
| Binary | 11110100100012 | |||
| Ternary | 1012012113 | |||
| Senary | 1001216 | |||
| Octal | 172218 | |||
| Duodecimal | 464112 | |||
| Hexadecimal | 1E9116 | |||
In mathematics
- 7825 is the smallest number n when it is impossible to assign two colors to natural numbers 1 through n such that every Pythagorean triple is multicolored, i.e. where the Boolean Pythagorean triples problem becomes false. The 200-terabyte proof to verify this is the largest ever made.[1][2]
- 7825 is a magic constant of n × n normal magic square and n-Queens Problem for n = 25.
