From Wikipedia, the free encyclopedia
325 (three hundred [and] twenty-five) is the natural number following 324 and preceding 326.
Natural number
| ||||
---|---|---|---|---|
Cardinal | three hundred twenty five | |||
Ordinal | 325th (three hundred twenty-fifth) | |||
Factorization | 52 × 131 | |||
Divisors | 1, 5, 13, 25, 65, 325 | |||
Greek numeral | ΤΚΕ´ | |||
Roman numeral | CCCXXV | |||
Binary | 1010001012 | |||
Ternary | 1100013 | |||
Senary | 13016 | |||
Octal | 5058 | |||
Duodecimal | 23112 | |||
Hexadecimal | 14516 |
In mathematics
[edit]- 325 is the smallest number to be the sum of two squares in 3 different ways: 12 + 182, 62 + 172 and 102 + 152.
- 325 is the smallest (and only known) 3-hyperperfect number.[1][2]
References
[edit]- ^ Sloane, N. J. A. (ed.). "Sequence A034897 (Hyperperfect numbers: x such that x = 1 + k*(sigma(x)-x-1) for some k > 0)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ^ Sloane, N. J. A. (ed.). "Sequence A007594 (Smallest n-hyperperfect number: m such that m=n(sigma(m)-m-1)+1; or 0 if no such number exists)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
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