Properties of the Number -129504

One Hundred Twenty-Nine Thousand Five Hundred Four

Basics

Value: -129505 → -129504 → -129503

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 ⁵ × 3 × 19 × 71

Divisors: 1, 2, 3, 4, 6, 8, 12, 16, 19, 24

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11111100111100000

Octal: -374740

Duodecimal: -62B40

Hexadecimal: -1f9e0

Square: 16771286016

Square Root: 359.8666419661595

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 subsets of {1..n} that can be linearly combined using nonnegative coefficients to obtain n. A365073

Numbers k such that σ(k) = 9*φ(k). A163667

Amicable triples: numbers such that σ(x) = σ(y) = σ(z) = x+y+z, x<y<z. We order these triples according to the common value of σ. Sequence gives y numbers. A125491

Numbers n such that the arithmetic, geometric and harmonic means of φ(n) and σ(n) are all integers. A65146

Numbers k such that φ(k) is equal to A008473(k). A39779

Balanced refactorable numbers. A78543

a(n) = ∑_k=0..n binomial(2·n,k)*binomial(n,k)*binomial(2·k,n). A103870