Properties of the Number -129076

One Hundred Twenty-Nine Thousand Seventy-Six

Basics

Value: -129077 → -129076 → -129075

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 23 ² × 61

Divisors: 1, 2, 4, 23, 46, 61, 92, 122, 244, 529

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11111100000110100

Octal: -374064

Duodecimal: -62844

Hexadecimal: -1f834

Square: 16660613776

Square Root: 359.2714850917061

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

Triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} having k increasing cycles of length >=2 (0<=k<= n/2). A cycle (b(1), b(2), ...) is said to be increasing if, when written with its smallest element in the first position, it satisfies b(1) < b(2) < b(3) < ... . A186757

Triangle read by rows, T(n,k) = ∑_j=0..k-1 S(n,j+1)*S(n,k-j) where S denotes the Stirling cycle numbers A132393, T(0,0)=1, n>=0, 0<=k<=2n-1. A254882

Indices of records in A157190: prime(a(n)) can be written in more ways as pq-p-q (p,q, prime) than any smaller prime. A157191

a(n) = (n!)² * ∑_k=1..n binomial(n,k) / k². A294117

Irregular triangle read by rows. Coefficients of the polynomials (-1)ⁿ*binomial(-x - 1, -x - n - 1) * binomial(n + x, x) * (n!)² in ascending order of powers. A358501