Properties of the Number -81139

Eighty-One Thousand One Hundred Thirty-Nine

Basics

Value: -81140 → -81139 → -81138

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 41 × 1979

Divisors: 1, 41, 1979, 81139

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10011110011110011

Octal: -236363

Duodecimal: -3AB57

Hexadecimal: -13cf3

Square: 6583537321

Square Root: 284.8490828491466

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

Number of pairs (p,q) of partitions of n into distinct parts such that p majorizes q in the dominance order. A265506

Numbers k such that prime(k), prime(k+1), prime(k+2), prime(k+3) and prime(k+4) all have the same last digit. A371390

a(n) = denominator(b(n)), where b(n) = b(n-1) + n if n is odd and b(n-1)*n/(b(n-1) + n) if n is even, with b(0) = 0. A392571