Properties of the Number 12731

Twelve Thousand Seven Hundred Thirty-One

Basics

Value: 12730 → 12731 → 12732

Parity: odd

Prime: No

Previous Prime: 12721

Next Prime: 12739

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 29 × 439

Divisors: 1, 29, 439, 12731

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11000110111011

Octal: 30673

Duodecimal: 744B

Hexadecimal: 31bb

Square: 162078361

Square Root: 112.8317331250389

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

Stack polyominoes with square core. A188674

Concatenation of n-th prime and n in decimal notation. A75110

Second-order spt function. A221140

a(1) = 3; a(n+1) = a(n)-th composite. A22451

Positive numbers y such that y² is of the form x²+(x+439)² with integer x. A159890

Expansion of x²*(-3+4·x)/(1-x³+x⁴). A110061

Non-palindromic numbers m such that m·repunit of length k is palindromic for all large enough k. A370053

Primonacci numbers: a(n)=a(n-2)+a(n-3)+a(n-5)+a(n-7)+a(n-11)+...+a(n-p(k))+... until n <= p(k), where p(k) is the k-th prime. a(1)=a(2)=1. A78465

Integers of the form 4n+3 for which ∑_i=1..u J(i,4n+3) obtains value zero exactly 7 times, when u ranges from 1 to (4n+3). Here J(i,k) is the Jacobi symbol. A166057

Number of 0..n arrays x(0..3) of 4 elements with zero 3rd differences. A200155