Properties of the Number -127

One Hundred Twenty-Seven

Basics

Value: -128 → -127 → -126

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 127

Divisors: 1, 127

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1111111

Octal: -177

Duodecimal: -A7

Hexadecimal: -7f

Square: 16129

Square Root: 11.269427669584644

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

Triangle read by rows: The n-th derivative of the logistic function written in terms of y, where y = 1/(1 + exp(-x)). A163626

Power series expansion of the Rogers-Ramanujan continued fraction 1+x/(1+x²/(1+x³/(1+x⁴/(1+...)))). A3823

G.f. A(x) defined by: A(x)² consists entirely of integer coefficients between 1 and 2 (A083952); A(x) is the unique power series solution with A(0)=1. A84202

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

Matrix inverse of triangle A022166. A135950

Triangle T that satisfies the matrix products: C*[T^-1]*C = T and T*[C^-1]*T = C, where C is Pascal's triangle. A118801

E.g.f. satisfies A(x) = exp( x/((1-x) * A(x)²) ). A361068

Expansion of q^1/6 * η(q) / η(q⁵) in powers of q. A145466

Numerator of Hermite(n, 1/16). A159521

Triangle read by rows: row 1 is [1]; for n >= 1, row n gives coefficients of expansion of (-1/x + x)*(1/x + 1 + x)^n-1 in order of increasing powers of x. A349812