Properties of the Number 12749

Twelve Thousand Seven Hundred Forty-Nine

Basics

Value: 12748 → 12749 → 12750

Parity: odd

Prime: No

Previous Prime: 12743

Next Prime: 12757

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 11 × 19 × 61

Divisors: 1, 11, 19, 61, 209, 671, 1159, 12749

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 11000111001101

Octal: 30715

Duodecimal: 7465

Hexadecimal: 31cd

Square: 162537001

Square Root: 112.91146974510606

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

Expansion of ∏_k>=1 (1 - x^10·k)/(1 - x^k). A261776

Numbers m with C(2·m, m) + prime(m) prime, where C(2·m, m) = (2·m)!/(m!)². A236242

Number of parts in all twice partitions of n where the second partition is strict. A327608

Triangle T(n,k) read by rows: T(n,k) = (k-1)*T(n-1,k) + (n-k+2)*T(n-1, k-1), with T(n,1)=1, for 1 <= k <= n, n >= 1. A157011

Where records occur in A080905 (endpoints of record runs). A80927

Composite squarefree numbers n such that p(i)+9 divides n-9, where p(i) are the prime factors of n. A225719

Indices of zeros in A268819. A269157

Quasi-Carmichael numbers to base 9: squarefree composites n such that (n,2·3*5·7) = 1 and prime p∣n ==> p-9∣n-9. A29554

Least positive integer m such that m·n divides F(m+n), where F(k) denotes the k-th Fibonacci number A000045(k). A297573

The number of domino stacks with n dominos. A390209