Properties of the Number -257

Two Hundred Fifty-Seven

Basics

Value: -258 → -257 → -256

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 257

Divisors: 1, 257

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100000001

Octal: -401

Duodecimal: -195

Hexadecimal: -101

Square: 66049

Square Root: 16.0312195418814

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

Coefficient of·in minimal polynomial of the continued fraction [1ⁿ,2,1,1,1,...], where 1ⁿ means n ones. A265762

Square array A(n,k), n >= 1, k >= 0, read by antidiagonals: A(n,k) = ∑_d∣n (-1)^n/d+d*d^k. A322083

a(n) = prime(n)-n*τ(n) where τ(n) is the number of divisors of n. A67292

Alternating sum of diagonals in A060177. A104575

a(n) = ∑_{d divides n} (-1)^{d + n/d} * d⁸. A321564

Dirichlet inverse of sequence b(n) = 1-A318833(n). A340367

Semiprime(n)*semiprime(n+3) - semiprime(n+1)*semiprime(n+2), where semiprime(n) is the n-th semiprime. A118780

a(n) = A135574(n+1) - 2·A135574(n). A135575

Numerators of an asymptotic series for the γ function (G. Nemes). A182912

Dirichlet inverse of A005941. A364574