Properties of the Number 81145

Eighty-One Thousand One Hundred Forty-Five

Basics

Value: 81144 → 81145 → 81146

Parity: odd

Prime: No

Previous Prime: 81131

Next Prime: 81157

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 5 × 16229

Divisors: 1, 5, 16229, 81145

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110011111001

Octal: 236371

Duodecimal: 3AB61

Hexadecimal: 13cf9

Square: 6584511025

Square Root: 284.8596145472362

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) = A066186(n) - A004125(n). A162362

a(1)=1; thereafter, a(n) is the least positive integer which has not already occurred and is such that |a(n)-a(n-1)| is different from any |a(k)-a(k-1)| which has already occurred. A81145