Properties of the Number 72521

Seventy-Two Thousand Five Hundred Twenty-One

Basics

Value: 72520 → 72521 → 72522

Parity: odd

Prime: No

Previous Prime: 72503

Next Prime: 72533

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 47 × 1543

Divisors: 1, 47, 1543, 72521

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001101101001001

Octal: 215511

Duodecimal: 35B75

Hexadecimal: 11b49

Square: 5259295441

Square Root: 269.2972335543015

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 n such that sopf(n) = sopf(n-1) + sopf(n-2) + sopf(n-3), where sopf(x) = sum of the distinct prime factors of x. A75784

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (0, 0, 1), (0, 1, 0), (1, 1, -1)}. A149880

a(1) = 6 and then the smallest triangular numbers, larger than the previous term, such that sum of two neighbors is also a triangular number. A72521

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