Properties of the Number 72491

Seventy-Two Thousand Four Hundred Ninety-One

Basics

Value: 72490 → 72491 → 72492

Parity: odd

Prime: No

Previous Prime: 72481

Next Prime: 72493

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 71 × 1021

Divisors: 1, 71, 1021, 72491

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001101100101011

Octal: 215453

Duodecimal: 35B4B

Hexadecimal: 11b2b

Square: 5254945081

Square Root: 269.2415272575908

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

a(n) = floor(n!*exp(-n)). A174299

Numbers k such that k² + k + 72491 is prime. A253239

Numbers k such that n² + n + k has no prime factor p <= 41 for any integer n. A323558

Define f(1) = 0. For n>=2, let f(n) = n - p where p is the largest prime <= n. a(n) = number of iterations of f to reach 0, starting from n. A72491