Properties of the Number -25442

Twenty-Five Thousand Four Hundred Forty-Two

Basics

Value: -25443 → -25442 → -25441

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 × 12721

Divisors: 1, 2, 12721, 25442

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110001101100010

Octal: -61542

Duodecimal: -12882

Hexadecimal: -6362

Square: 647295364

Square Root: 159.5054857990784

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

Becomes prime after n iterations of f(x) = σ(x)-1 (least inverse of A039655). A39656

Expansion of 1 / ∏_{k >= 1} (1-q^k)²*(1-q^11k)². A32442

The number of unlabeled graphs on n nodes with degree of 1 or 2. A186417

The number of 4-alternating permutations of [n]. A250259

Number of proper factorizations of p1ⁿ*p2², where p1 and p2 are distinct primes. A31125

Numbers n for which there are exactly ten k such that n = k + reverse(k). A72434

Number of (n+2) X (4+2) 0..1 arrays with each 3 X 3 subblock having clockwise perimeter pattern 00000001 00000101 or 00000111. A261707

a(n) = 2^-n*∑_k=0..n binomial(2·n+1, 2·k+1)*A000364(n-k). A111196