Properties of the Number -141

One Hundred Forty-One

Basics

Value: -142 → -141 → -140

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 6

Digital Root: 6

Palindrome: Yes

Factorization: 3 × 47

Divisors: 1, 3, 47, 141

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10001101

Octal: -215

Duodecimal: -B9

Hexadecimal: -8d

Square: 19881

Square Root: 11.874342087037917

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

G.f.: ∏_k>=1 1/(1+x^k)^k. A255528

Dirichlet inverse of the gcd-sum function (A018804). A101035

a(n+1) = -∑_d∣n a(d), a(1) = 1. A281487

Expansion of χ(-q) / χ(-q⁵) in powers of q where χ() is a Ramanujan θ function. A133563

4th differences of partition numbers A000041. A81094

Expansion of ∏_k>=1 (1 - q^k)⁸/(1 - q^7·k) in powers of q. A282942

a(n) = 3·a(n-1) - a(n-3) for n>2, with a(0)=1, a(1)=-1, a(2)=0. A122100

Expansion of φ(-x) * χ(-x) in powers of·where φ(), χ() are Ramanujan θ functions. A132970

A linear mapping a(n) = x + d·n of pairs of integers (x,d), where the pairs are enumerated by the counterclockwise square spiral (an axis-parallel number spiral) starting at 0. A304586

The y-coordinates of the vertices of the Babylonian Wurm. A342623