Properties of the Number -12400

Twelve Thousand Four Hundred

Basics

Value: -12401 → -12400 → -12399

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 7

Digital Root: 7

Palindrome: No

Factorization: 2 ⁴ × 5 ² × 31

Divisors: 1, 2, 4, 5, 8, 10, 16, 20, 25, 31

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11000001110000

Octal: -30160

Duodecimal: -7214

Hexadecimal: -3070

Square: 153760000

Square Root: 111.35528725660043

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 n-node triangulations of sphere in which every node has degree >= 4. A103

a(n) = 10ⁿ+7ⁿ-1. A155657

Larger of amicable pair m < n defined by t(n) = m and t(m) = n where t(n) = ψ(n) - n and ψ(n) = A001615(n) is the Dedekind ψ function. A323330

a(n) = n*(n+1)*(5·n + 4)/6. A162147

T(n,k)=Number of nXk 0..2 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value (x(i,j)+1) mod 3 and at least one element with value (x(i,j)-1) mod 3, and upper left element zero. A231031

Triangle read by rows: T(n,k) = number of nonequivalent dissections of an n-gon into k polygons by nonintersecting diagonals up to rotation. A295633

Numbers k such that σ(k) divides k². A90777

Number of permutations of n distinct letters (ABCD...) each of which appears 5 times and having n-2 fixed points. A123296

Triangle T, read by rows, where g.f. of row n of Tⁿ = (y + n*(n+1))ⁿ for n>=0 and Tⁿ denotes the n-th matrix power of T. A132875

Number of solutions to gcd(u² + v² + w² + x² + y² + z², n) = 1 with u, v, w, x, y, z in [0,n-1]. A238534