Properties of the Number -20621

Twenty Thousand Six Hundred Twenty-One

Basics

Value: -20622 → -20621 → -20620

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 17 × 1213

Divisors: 1, 17, 1213, 20621

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101000010001101

Octal: -50215

Duodecimal: -BB25

Hexadecimal: -508d

Square: 425225641

Square Root: 143.60013927569847

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) = 25·n² - 14·n + 2. A154357

Number of tilings of a 12 X n rectangle using 2n hexominoes of shape I. A250663

x-value of the smallest solution to 2·x² - p·y² = (-1)^(p+1/4), p = A002145(n). A306618

Positions of 11's in A131744. A133152

First member of a pair of numbers occurring in the definition of 2-happy couples. A191862

Column 6 of A060244. A291596

Increasing gaps in A038593 (lower terms). A93342

(1/8)*number of lattice points with odd indices in a cubic lattice inside a sphere around the origin with radius 2·n. A120884

p-INVERT of (1,0,0,1,0,0,1,0,0,...), where p(S) = 1 - S² - S³. A292321

Duplicate of A093342. A93389