Properties of the Number -71980

Seventy-One Thousand Nine Hundred Eighty

Basics

Value: -71981 → -71980 → -71979

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 5 × 59 × 61

Divisors: 1, 2, 4, 5, 10, 20, 59, 61, 118, 122

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10001100100101100

Octal: -214454

Duodecimal: -357A4

Hexadecimal: -1192c

Square: 5181120400

Square Root: 268.29088691194863

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

Nonnegative values·of solutions (x, y) to the Diophantine equation x²+(x+161)² = y². A206426

Irregular triangle read by rows: T(n,k) is the number of sensed 3-connected planar maps with n >= 4 faces and k >= 4 vertices. A239893

a(n) = 2·A000447(n). A259110

Number of nX3 0..1 arrays with every element unequal to 1, 2, 3, 6 or 7 king-move adjacent elements, with upper left element zero. A305084