Properties of the Number -129520

One Hundred Twenty-Nine Thousand Five Hundred Twenty

Basics

Value: -129521 → -129520 → -129519

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ⁴ × 5 × 1619

Divisors: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11111100111110000

Octal: -374760

Duodecimal: -62B54

Hexadecimal: -1f9f0

Square: 16775430400

Square Root: 359.8888717368182

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

G.f.: exp( ∑_n>=1 A002129(n²)*xⁿ/n ), where A002129(n) is the excess of sum of odd divisors of n over sum of even divisors of n. A225925

Expansion of ∏_k>=1 ((1 + x^2·k)/(1 - x^2·k-1))^k. A295831

Number of permutations p of [n] such that 0p has a nonincreasing jump sequence beginning with ceiling(n/2). A303204

Let S denote the palindromes in the language {0,1,2,...,n-1}*; a(n) = number of words of length 4 in the language SS. A187277

Number of permutations p of [2n+1] such that 0p has a nonincreasing jump sequence beginning with n+1. A303203

Number of permutations p of [n] such that 0p has a nonincreasing jump sequence beginning with seven. A292173

Number of involutions of length 2n which are invariant under the reverse-complement map and have no decreasing subsequences of length 8. A145870