Properties of the Number 12690

Twelve Thousand Six Hundred Ninety

Basics

Value: 12689 → 12690 → 12691

Parity: even

Prime: No

Previous Prime: 12689

Next Prime: 12697

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ³ × 5 × 47

Divisors: 1, 2, 3, 5, 6, 9, 10, 15, 18, 27

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11000110010010

Octal: 30622

Duodecimal: 7416

Hexadecimal: 3192

Square: 161036100

Square Root: 112.64990013311153

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 partitions of n in which the greatest part is 10. A26816

Numbers m such that 2^m reversed is prime. A57708

Number of partitions of n into at most 10 parts. A8639

a(n) = n*(14·n + 3). A195025

T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum plus the lower median minus the minimum of every 2X2 subblock equal. A237315

Number of partitions of n into 10 distinct and relatively prime parts. A341914

G.f.: 1 / ∏_n>=0 (1 - xⁿ⁺⁴)⁽ⁿ⁺¹*(n+2)*(n+3)/3!). A264924

θ series of A*_9 lattice. A23921

Pair the natural numbers such that the n-th pair is (k, k+p(n)) where k is the smallest number not occurring earlier and p(n) is the n-th prime. (1, 3), (2, 5), (4, 9), (6, 13), (7, 18), (8, 21), (10, 27), (11, 30), (12, 35), (14, 43), ... This is the sequence of the product of the members of every pair. A75316

Consider recurrence b(0) = (2n+1)/2, b(n) = b(0)*floor(b(n-1)); sequence gives first integer reached. A87675