Properties of the Number 12940

Twelve Thousand Nine Hundred Forty

Basics

Value: 12939 → 12940 → 12941

Parity: even

Prime: No

Previous Prime: 12923

Next Prime: 12941

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 5 × 647

Divisors: 1, 2, 4, 5, 10, 20, 647, 1294, 2588, 3235

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 11001010001100

Octal: 31214

Duodecimal: 75A4

Hexadecimal: 328c

Square: 167443600

Square Root: 113.75412080447899

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

Cupolar numbers: a(n) = (n+1)*(5·n² + 7·n + 3)/3. A96000

Nonnegative values·of solutions (x, y) to the Diophantine equation x²+(x+647)² = y². A130013

a(n+1) = a(n) + floor(a(n)/4) with a(0)=4. A182305

Numbers k such that 1·k + 1, 3·k + 1, 9·k + 1, 27·k + 1 are all primes. A112041

Number of (w,x,y,z) with all terms in {1,...,n} and w²<=x²+y²+z². A212093

Indices of primes followed by a gap (distance to next larger prime) of 40. A320718

Triangle read by rows: T(m,n) is the number of simple paths for a Racetrack car (using von Neumann neighborhood) with initial velocity zero, going from one corner to the diagonally opposite corner on an m X n grid, 1 <= n <= m. A351108

a(1)=1. a(n+1) = ∑_k=1..n a(b(k,n)), where b(k,n) is the largest positive integer that, when written in binary, occurs as a substring in both binary k and binary n. A175491

Number of numbers whose base 5/4 expansion (see A024634) has n digits. A245357

Number of (n+1) X (5+1) 0..1 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically. A258551