Properties of the Number 325

Three Hundred Twenty-Five

Basics

Value: 324 → 325 → 326

Parity: odd

Prime: No

Previous Prime: 317

Next Prime: 331

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 5 ² × 13

Divisors: 1, 5, 13, 25, 65, 325

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: Yes

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101000101

Octal: 505

Duodecimal: 231

Hexadecimal: 145

Square: 105625

Square Root: 18.027756377319946

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Triangular numbers: a(n) = binomial(n+1,2) = n*(n+1)/2 = 0 + 1 + 2 + ... + n. A217

Moser-de Bruijn sequence: sums of distinct powers of 4. A695

Hexagonal numbers: a(n) = n*(2·n-1). A384

a(n) = n² + 1. A2522

Numbers whose base-3 representation contains no 2. A5836

Binary palindromes: numbers whose binary expansion is palindromic. A6995

a(n) = 6·n + 1. A16921

Odd numbers of the form p^1+4k * r², where p is prime of the form 1+4m, r > 1, and gcd(p,r) = 1. (Euler's criteria for odd perfect numbers). A228058

Number of fractions in Farey series of order n. A5728

Ordered hypotenuses (with multiplicity) of primitive Pythagorean triangles. A20882