Properties of the Number -427

Four Hundred Twenty-Seven

Basics

Value: -428 → -427 → -426

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 7 × 61

Divisors: 1, 7, 61, 427

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110101011

Octal: -653

Duodecimal: -2B7

Hexadecimal: -1ab

Square: 182329

Square Root: 20.663978319771825

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

Nonzero coefficients of the Swiss-Knife polynomials for the computation of Euler, tangent, and Bernoulli numbers (triangle read by rows). A153641

Exponential Riordan array (sech(x),x). A119879

Irregular triangle read by rows: row n is the expansion of (1 + 2·x - x²)ⁿ. A123199

Triangle of coefficients of the Pbar polynomials, read by rows. A245244

Triangle read by rows: T(n, k) = (-2)^k*binomial(n, k)*Euler(k, 1/2). A81658

G.f. A(x) satisfies A(x) = 1 + x * ((1 - x) / A(x))^7/2. A366437

Triangle, read by rows, equal to the matrix inverse of triangle A103327, where A103327(n,k) = binomial(2·n+1,2·k+1). A104033

Euler-Seidel matrix T(k,n) with start sequence e.g.f. 2x/(1+e^2x), read by antidiagonals. A99028

Triangle, read by rows, such that row n equals the coefficients of x^n²+n-1+k in F(x,n) for k = 1..n, where F(x,n) = (1 + x·F(x,n))*(1 + xⁿ/F(x,n)), for n>=1. A200171

a(n) = 384·n³ - 1184·n² + 1228·n - 427. A272131