Properties of the Number 81725

Eighty-One Thousand Seven Hundred Twenty-Five

Basics

Value: 81724 → 81725 → 81726

Parity: odd

Prime: No

Previous Prime: 81707

Next Prime: 81727

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 5 ² × 7 × 467

Divisors: 1, 5, 7, 25, 35, 175, 467, 2335, 3269, 11675

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111100111101

Octal: 237475

Duodecimal: 3B365

Hexadecimal: 13f3d

Square: 6678975625

Square Root: 285.8758471784561

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

Coefficient of·in the reduction by x² -> x+1 of the polynomial p(n,x) defined at Comments. A192951

a(n) = A065560(n) + n - prime(n). A81725