Properties of the Number 12681

Twelve Thousand Six Hundred Eighty-One

Basics

Value: 12680 → 12681 → 12682

Parity: odd

Prime: No

Previous Prime: 12671

Next Prime: 12689

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 1409

Divisors: 1, 3, 9, 1409, 4227, 12681

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 11000110001001

Octal: 30611

Duodecimal: 7409

Hexadecimal: 3189

Square: 160807761

Square Root: 112.60994627474076

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 distinct means of nonempty subsets of {1,...,n}. A135342

a(n) = 104·n + 9977. A126978

a(n) = floor(1/(π - 2ⁿ⁺¹*sin(π/2ⁿ⁺¹))). A248347

a(n) = ∑_i=0..n digsum₉(i)³, where digsum₉(i) = A053830(i). A231686

Number of palstars of length 2n over an alphabet of size 3. A246020

Number of vertices in an diagonal-edged (or diamond-shaped) checkerboard with width and height 2·n-1 (see Comments in A333434 for definition). A333459

Odd numbers for which σ(k) is congruent to 2 modulo 4 and the 3-adic valuation of k is one larger than the 3-adic valuation of σ(k). A351534

Number of (w,x,y,z) with all terms in {1,...,n} and w+x<2y+2z. A212562

Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 58 ones. A31826

Number of nondecreasing arrangements of 4 nonzero numbers in -(n+2)..(n+2) with sum zero. A188334