Properties of the Number 12855

Twelve Thousand Eight Hundred Fifty-Five

Basics

Value: 12854 → 12855 → 12856

Parity: odd

Prime: No

Previous Prime: 12853

Next Prime: 12889

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 857

Divisors: 1, 3, 5, 15, 857, 2571, 4285, 12855

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 11001000110111

Octal: 31067

Duodecimal: 7533

Hexadecimal: 3237

Square: 165251025

Square Root: 113.37989239719712

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 integer compositions of n whose leaders of strictly decreasing runs are distinct. A374761

Numbers k such that k, k+1, k+2 and k+3 have the same number of divisors. A6601

Numbers k such that k through k+4 all have the same number of divisors. A49051

Relative of Hofstadter Q-sequence: a(n) = max(0, n+3201) for n <= 0; a(n) = a(n-a(n-1)) + a(n-a(n-2)) + a(n-a(n-3)) for n > 0. A373236

Start with 83; if even, divide by 2; if odd, add next three primes: Orbit of 83 under iterations of A174221, the "PrimeLatz" map. A293979

Numbers of the form 86+p² (where p is a prime). A138692

Expansion of e.g.f. exp( -(exp(x) - 1)² / 2 ). A354395

a(n) = floor(11ⁿ/5ⁿ). A94987

Triangle T(n,k) read by rows: number of lattice paths from (0,0) to (0,2n) with steps (1,1) or (1,-1) that stay between the lines y=0 and y=k. A101475

Numbers k whose decimal expansion can be split into at least two parts whose binary equivalents can be concatenated (in the same order) to form the binary expansion of the original number k. A237041