Properties of the Number 12656

Twelve Thousand Six Hundred Fifty-Six

Basics

Value: 12655 → 12656 → 12657

Parity: even

Prime: No

Previous Prime: 12653

Next Prime: 12659

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ⁴ × 7 × 113

Divisors: 1, 2, 4, 7, 8, 14, 16, 28, 56, 112

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11000101110000

Octal: 30560

Duodecimal: 73A8

Hexadecimal: 3170

Square: 160174336

Square Root: 112.49888888340186

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

Product of a prime and the previous number. A36689

Numbers k such that k² divides 15^k-1. A128395

Numbers k such that k³ divides 15^k² - 1. A177915

T(n,k)=Number of (n+1)X(k+1) binary arrays with every 2X2 subblock trace equal to some horizontal or vertical neighbor 2X2 subblock trace. A185750

Numbers n such that the decimal number concat(5,n) is a square. A273360

Triangle read by rows: T(n,k) is the number of rooted toroidal maps with n edges and k faces and without separating cycles or isthmuses, n >= 2, k = 1..n-1. A343090

a(n) = (3·n+1)*(3·n+2). A1504

Numbers m such that m^k does not divide the denominator of the m-th generalized harmonic number H(m,k) nor the denominator of the m-th alternating generalized harmonic number H'(m,k), for k = 2. A128672

Numbers m such that m^k does not divide the denominator of the m-th generalized harmonic number H(m,k) nor the denominator of the m-th alternating generalized harmonic number H'(m,k), for k = 6. A128676

a(n) = 25·n² + 25·n + 6. A177059