Properties of the Number -129681

One Hundred Twenty-Nine Thousand Six Hundred Eighty-One

Basics

Value: -129682 → -129681 → -129680

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ⁴ × 1601

Divisors: 1, 3, 9, 27, 81, 1601, 4803, 14409, 43227, 129681

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

375 Try Today's Challenge

Representations

Binary: -11111101010010001

Octal: -375221

Duodecimal: -63069

Hexadecimal: -1fa91

Square: 16817161761

Square Root: 360.11248242736605

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

Odd numbers k, not powers of primes, such that σ(k) == 2 modulo 8 and σ(σ(k)) == 6 modulo 8. A332458

Triangle of coefficients T(n,k) of y^k in ∏_k=0..n-1 (1 + (k+2)*y + y²), read by rows of terms k = 0..2·n, for n >= 0. A324960

a(n) is the coefficient of yⁿ in ∏_k=0..n (1 + (k+2)*y + y²), for n >= 0. A324962