Properties of the Number 12906

Twelve Thousand Nine Hundred Six

Basics

Value: 12905 → 12906 → 12907

Parity: even

Prime: No

Previous Prime: 12899

Next Prime: 12907

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ³ × 239

Divisors: 1, 2, 3, 6, 9, 18, 27, 54, 239, 478

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 11001001101010

Octal: 31152

Duodecimal: 7576

Hexadecimal: 326a

Square: 166564836

Square Root: 113.60457737256893

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

Dirichlet g.f.: ∏_k>=2 1 / (1 - k^-s)^k³. A343283

Euler transform of powers of 8. A144072

Index sequence for limit-reversing A000002; see Comments. A245937

Numerators of continued fraction convergents to sqrt(421). A41800

Row sums of triangle A175009. A175006

Trisection of A107926: The least number k such that there are primes p and q with p - q = 6·n+2, p + q = k, and p the least such prime >= k/2. A234955

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 454", based on the 5-celled von Neumann neighborhood. A272278

Number of partitions of n into parts not of the form 23k, 23k+2 or 23k-2. Also number of partitions with 1 part of size 1 and differences between parts at distance 10 are greater than 1. A35990

Base-7 palindromes that start with 5. A43019

Triangle T(n, k) read by rows: T(0, 0) = 1 and T(n, k) = ∑_i=0..k-1 T(n, i) + ∑_i=k..n-1 T(n-1, i). A318301