325 (number)
325 (three hundred [and] twenty-five) is the natural number following 324 and preceding 326.
{{Infobox number|cardinal=three hundred twenty five|ordinal=325th
(three hundred twenty-fifth)|factorization=52 × 131|divisor=1, 5, 13, 25, 65, 325|roman=CCCXXV}}
In mathematics
- 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.{{Cite OEIS|A034897|2=Hyperperfect numbers: x such that x = 1 + k*(sigma(x)-x-1) for some k > 0}}{{Cite OEIS|A007594|2=Smallest n-hyperperfect number: m such that m=n(sigma(m)-m-1)+1; or 0 if no such number exists}}