Properties of the Number -122880

One Hundred Twenty-Two Thousand Eight Hundred Eighty

Basics

Value: -122881 → -122880 → -122879

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 ¹³ × 3 × 5

Divisors: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8109 Try Today's Challenge

Representations

Binary: -11110000000000000

Octal: -360000

Duodecimal: -5B140

Hexadecimal: -1e000

Square: 15099494400

Square Root: 350.5424368033063

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: Yes

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: terms T(n,k) of a binomial decomposition of nⁿ as Sum(k=0..n)T(n,k). A244135

Triangle read by rows: T(n, m) = S1(n, m)*4^n-m, where S1 are the signed Stirling numbers of first kind A008275 (n >= 1, 1 <= m <= n). A51142

Irregular triangle read by rows: T(n,m) = coefficients in a power/Fourier series expansion of an arbitrary anharmonic oscillator's exact phase space trajectory. A276738

Expansion of (1-8x²-24x³)/((1-2x)²*(1+2x+4x²)). A168054

Quadruple factorial numbers n!!!!: a(n) = n·a(n-4). A7662

a(0)=0, a(1)=1, a(n) = n·2^n-2 for n >= 2. A57711

a(n) = 4ⁿ * n!. A47053

15-almost primes (generalization of semiprimes). A69276

a(1) = 2, a(n) = σ(a(n-1)). A7497

a(n) = 15·2ⁿ. A110286