Properties of the Number -71

Seventy-One

Basics

Value: -72 → -71 → -70

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 8

Digital Root: 8

Palindrome: No

Factorization: 71

Divisors: 1, 71

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1000111

Octal: -107

Duodecimal: -5B

Hexadecimal: -47

Square: 5041

Square Root: 8.426149773176359

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

a(n) = n * μ(n), where μ is the Möbius function A008683. A55615

Bessel polynomial y_n(-2). A2119

Values of n such that L(1) and N(1) are both prime, where L(k) = (n²+n+1)*2^2·k + (2·n+1)*2^k + 1, N(k) = (n²+n+1)*2^k + n. A226921

a(n) = a(n-1) - a(n-3) with a(1)=0, a(2)=0, a(3)=1. A50935

Signed denominators of Leibniz series for π/4. A157142

Expansion of f(-x) / f(-x³) in powers of·where f() is a Ramanujan θ function. A137569

Coefficients of the '6th-order' mock θ function ψ(q). A53269

Numerators of coefficients c(n) in product expansion of 1 + tan x = ∏_k>=1 1 + c(k)*x^k. A353583

Shifts 2 places left under inverse binomial transform. A10739

Expansion of ∏_k>=1 (1 + x^9·k)/(1 + x^k). A261733