Properties of the Number -671

Six Hundred Seventy-One

Basics

Value: -672 → -671 → -670

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 11 × 61

Divisors: 1, 11, 61, 671

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1010011111

Octal: -1237

Duodecimal: -47B

Hexadecimal: -29f

Square: 450241

Square Root: 25.903667693977237

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

Expansion of (1-x-x^N)/((1-x)(1-x²)(1-x³)...(1-x^N)) for N = 7. A60026

Triangle c(n,k) of the numerators of coefficients [x^k] P(n,x) of the polynomials P(n,x) of A129891. A140749

Expansion of ∏_k>=1 (1-x^3·k)/(1-x^2·k). A262346

E.g.f. B(x) = B(x,x), where B(x,y) is the e.g.f. of triangle A326798. A326795

The c coefficients of the transform a·x² + (4·a/k - b)*x + 4·a/k² + 2·b/k + c = 0 for a,b,c = 1,-1,-1, k = 1,2,3... A229526

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 457", based on the 5-celled von Neumann neighborhood. A272283

Coefficient triangle sequence of characteristic polynomials of a Fermat like matrix:M(n)=Pascal n-th matrix: F(n)=Inverse[Transpose[M(n)]].M(n). A168228

a(n) = n*(n² + 1)/2. A6003

Brilliant numbers: semiprimes (products of two primes, A001358) whose prime factors have the same number of decimal digits. A78972

a(n) = ∑_k=1..n n/gcd(n,k). A57660