Properties of the Number 12831

Twelve Thousand Eight Hundred Thirty-One

Basics

Value: 12830 → 12831 → 12832

Parity: odd

Prime: No

Previous Prime: 12829

Next Prime: 12841

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 7 × 13 × 47

Divisors: 1, 3, 7, 13, 21, 39, 47, 91, 141, 273

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11001000011111

Octal: 31037

Duodecimal: 7513

Hexadecimal: 321f

Square: 164634561

Square Root: 113.27400407860578

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

Triangle read by rows, S₃(n, k) where S_m(n, k) are the Stirling-Frobenius subset numbers of order m; n >= 0, k >= 0. A225468

Expansion of 1/((1-2·x) * (1-5·x) * (1-8·x)). A16297

Pseudoprimes to base 9, written in base 9. A262154

Numbers n such that n!! - 512 is prime. A258452

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

1/4 of the even edge of least 2-adic valuation of a primitive 3-simplex (0, b=A031173, c=A031174, d=A031175). A298046

Fibonacci sequence beginning 0, 13. A22347

63-gonal numbers: a(n) = n*(61·n - 59)/2. A98140

Number of (5+1) X (n+1) 0..1 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically. A258558

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 334", based on the 5-celled von Neumann neighborhood. A271283