Properties of the Number -2561

Five Hundred Sixty-One

Basics

Value: -2562 → -2561 → -2560

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 13 × 197

Divisors: 1, 13, 197, 2561

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101000000001

Octal: -5001

Duodecimal: -1595

Hexadecimal: -a01

Square: 6558721

Square Root: 50.60632371551998

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 of (Gaussian) q-binomial coefficients for q=-14. A15132

a(n) is the numerator of the real part of ∏_k=1..n (1 + i/k) where i is the imaginary unit. A370551

Triangle T(n,k) = (-1)^k * A119258(n,k) read by rows, 0 <= k <= n. A145661

Numerators of an asymptotic series for the γ function (even power series). A277000

a(n) = ∑_{k = 0..n} (-1)^k*14^k. A268413

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 249", based on the 5-celled von Neumann neighborhood. A271015

Expansion of e.g.f. exp(x * (3 - 2·exp(x))). A367877

A symmetrical triangle sequence based on:q=2/12;t(n,m,q)=12*(Binomial[n, m]*(1 - q) + (((n + m + 1)!/((n + 1)!* m!)) + ((2·n - m + 1)!/((n + 1)!*(n - m)!)))*q). A174949

Numbers that are the sum of 11 positive 8th powers. A3389

Numbers that are the sum of 6 positive 9th powers. A3395