Properties of the Number -141680

One Hundred Forty-One Thousand Six Hundred Eighty

Basics

Value: -141681 → -141680 → -141679

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ⁴ × 5 × 7 × 11 × 23

Divisors: 1, 2, 4, 5, 7, 8, 10, 11, 14, 16

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100010100101110000

Octal: -424560

Duodecimal: -69BA8

Hexadecimal: -22970

Square: 20073222400

Square Root: 376.40403823551094

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

If X₁,...,X_n is a partition of a 2n-set X into 2-blocks then a(n) is equal to the number of 4-subsets of X containing none of X_i, (i=1,...,n). A130810

Number of ways to place 2 nonattacking amazons (superqueens) on an n X n board. A172200

Expansion of 1/sqrt((1-x³)² - 4·x⁴). A383571

Numbers k not divisible by 6 such that σ(k) > 3·k. A126104

Number of bracelets (turnover necklaces) of length n that have no reflection symmetry and consist of 6 white beads and n-6 black beads. A308401

G.f. A(x) satisfies A(x) = 1 + x⁴*(1+x)*A(x)⁴. A376546

The least totient number k with exactly n solutions to the equation φ(x) = k, where all the solutions are nontotient numbers (A007617). A378510

Number of n-step self-avoiding walks on a line, where step X skips X - 1 spaces. A175941

Exponential Riordan array (e^mx,x·A000108(x)), m=2. A185947

Number of (n+1)X(6+1) 0..2 arrays with the upper median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one. A237635