325 (number)

325 (three hundred [and] twenty-five) is the natural number following 324 and preceding 326.

← 324 325 326 →
Cardinalthree hundred twenty five
Ordinal325th (three hundred twenty-fifth)
Factorization52 × 131
Divisors1, 5, 13, 25, 65, 325
Greek numeralΤΚΕ´
Roman numeralCCCXXV
Binary1010001012
Ternary1100013
Senary13016
Octal5058
Duodecimal23112
Hexadecimal14516

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.[1][2]

References

  1. ^ 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.
  2. ^ 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.