Properties of the Number -21144

Twenty-One Thousand One Hundred Forty-Four

Basics

Value: -21145 → -21144 → -21143

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 2 ³ × 3 × 881

Divisors: 1, 2, 3, 4, 6, 8, 12, 24, 881, 1762

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101001010011000

Octal: -51230

Duodecimal: -102A0

Hexadecimal: -5298

Square: 447068736

Square Root: 145.4097658343483

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

a(n) = 2·n*a(n-1) - a(n-2), with a(0)=0, a(1)=1. A106174

Triangle read by rows: T(n,k) is the number of Dyck paths of semilength n having k ascents of length 2 starting at an odd level (0<=k<=floor(n/2)-1 for n>=2; k=0 for n=0,1). A114463

a(n) = 1728·n - 1320. A157263

Row sums of triangle A096744, which shifts one place diagonally left and upward under the matrix cube operation. A96746

Triangle read by rows: T(n,k) is number of ternary words of length n and having k runs of 0's of odd length (0 <= k <= ceiling(n/2); a run of 0's is a subsequence of consecutive 0's of maximal length). A119914

a(0) = 1, a(n) = 22·n² + 2 for n>0. A10012

Bond series for second parallel moment of hexagonal net. A120543

Kekulé numbers for certain benzenoids (see the Cyvin-Gutman book for details). A123348

Numbers k that end with ( sum of digits of k )². A270343

Number of minimal dominating sets in the n-pan graph. A290273