Properties of the Number -25181

Twenty-Five Thousand One Hundred Eighty-One

Basics

Value: -25182 → -25181 → -25180

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 13 ² × 149

Divisors: 1, 13, 149, 169, 1937, 25181

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8109 Try Today's Challenge

Representations

Binary: -110001001011101

Octal: -61135

Duodecimal: -126A5

Hexadecimal: -625d

Square: 634082761

Square Root: 158.68522300453813

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

Number of squarefree graphs on n vertices. A6786

MM-numbers of labeled multigraphs spanning an initial interval of positive integers. A320459

MM-numbers of labeled multi-hypergraphs with no singletons spanning an initial interval of positive integers. A320464

Odd numbers k, not powers of primes, such that σ(k) == 2 modulo 8 and σ(σ(k)) == 6 modulo 8. A332458

Numbers k such that the continued fraction for sqrt(k) has period 81. A20420

Product between n-th prime and next perfect square. A229497

Numbers k such that k!6 + 18 is prime, where k!6 is the sextuple factorial number (A085158 ). A288445

a(n) = (8·n³ + 15·n² + 13·n)/6. A332698

a(n) = n-th prime number·n-th lucky number. A32601