Properties of the Number -21142

Twenty-One Thousand One Hundred Forty-Two

Basics

Value: -21143 → -21142 → -21141

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 2 × 11 × 31 ²

Divisors: 1, 2, 11, 22, 31, 62, 341, 682, 961, 1922

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101001010010110

Octal: -51226

Duodecimal: -1029A

Hexadecimal: -5296

Square: 446984164

Square Root: 145.40288855452633

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 t(n,m)= binomial(n+m-1,n-1) + binomial(2·n-m-1,n-1) -binomial(2·n-1,n-1) read by rows, 0<=m<=n. A174952

Variation of Boustrophedon transform applied to all-1's sequence (see Comments for details). A59216

Numbers k that, when expressed in base 5 and then interpreted in base 9, give a multiple of k. A62931

a(n) = 22·n². A195323

The array in A059216 read by antidiagonals in 'up' direction. A59217

a(n) = prime(prime(prime(A028815(n) - 1) - 1) - 1) - 1. A141133

a(n) = self-convolution of row n of array T given by A026536. A27267

Each permutation in the list A060117 converted to Site Swap notation, with digits reversed. "Zero throws" (fixed elements) indicated with 0's. A60496

Number of primitive (aperiodic) word structures of length n using an infinite alphabet. A82951

Expansion of ∏_k>=1 B(x^k), where B(x) is the g.f. of A003114. A327690