Properties of the Number 72285

Seventy-Two Thousand Two Hundred Eighty-Five

Basics

Value: 72284 → 72285 → 72286

Parity: odd

Prime: No

Previous Prime: 72277

Next Prime: 72287

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 5 × 61 × 79

Divisors: 1, 3, 5, 15, 61, 79, 183, 237, 305, 395

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001101001011101

Octal: 215135

Duodecimal: 359B9

Hexadecimal: 11a5d

Square: 5225121225

Square Root: 268.858698947979

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

Numbers k such that k² contains only digits {1,2,5}. A31153

Composite squarefree numbers n such that p + τ(n) divides n + φ(n), where p are the prime factors of n, τ(n) = A000005(n) and φ(n) = A000010(n). A229322

Numbers k such that k and k² use only the digits 1, 2, 5, 7 and 8. A137008

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, 1), (0, 0, -1), (1, 0, 0)}. A148160

Numerators of inverse unimodal analog of binomial coefficients: binomial(n,m) = ∑_k=0..n-m a(2·k+m-1, 2·k). A72285