Properties of the Number 12664

Twelve Thousand Six Hundred Sixty-Four

Basics

Value: 12663 → 12664 → 12665

Parity: even

Prime: No

Previous Prime: 12659

Next Prime: 12671

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ³ × 1583

Divisors: 1, 2, 4, 8, 1583, 3166, 6332, 12664

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11000101111000

Octal: 30570

Duodecimal: 73B4

Hexadecimal: 3178

Square: 160376896

Square Root: 112.5344391730816

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

Narayana's cows sequence: a(0) = a(1) = a(2) = 1; thereafter a(n) = a(n-1) + a(n-3). A930

Bisection of A000930. A2478

a(n) = a(n-1) + a(n-3) for n >= 3, with a(0) = 1, a(1) = a(2) = 0. This recurrence can also be used to define a(n) for n < 0. A78012

Expansion of (1-x)³/(1 - 4·x + 3·x² - x³). A52529

a(n) = n-1, if n <= 2, otherwise A107458(n-1) + A107458(n-2). A135851

Number of ways to tile a 2 X n room with 1 X 2 Tatami mats. At most 3 Tatami mats may meet at a point. A68921

T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00000111. A260070

Starts of runs of 3 consecutive Pell-Niven numbers (A352320). A352322

T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with no 2X2 subblock having its minimum diagonal element less than its minimum antidiagonal element. A251100

Number of (17,11)-reverse multiples with n digits. A226916