Properties of the Number 15845

Fifteen Thousand Eight Hundred Forty-Five

Basics

Value: 15844 → 15845 → 15846

Parity: odd

Prime: No

Previous Prime: 15823

Next Prime: 15859

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 5 × 3169

Divisors: 1, 5, 3169, 15845

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11110111100101

Octal: 36745

Duodecimal: 9205

Hexadecimal: 3de5

Square: 251064025

Square Root: 125.87692401707312

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

Irregular array read by rows. a(n) is the largest element in the primitive Collatz-like 3x-k cycle associated with A226623(n). A226624

Number of partitions of n having depth 2; see Comments. A237750

Nearest integer to γ(n + 2/9)/γ(2/9). A20023

a(n) = ceiling of γ(n + 2/9)/γ(2/9). A20113

Numbers k such that 10^k - 51 is prime. A178429

Number of reduced normal play partisan games born on or before day n. A260969

Expansion of (χ(-x) * χ(-x¹⁹))^-2 in powers of·where χ() is a Ramanujan θ function. A134004

Number of strings of numbers x(i=1..6) in 0..n with sum i⁴*x(i) equal to 1296·n. A184352

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 478", based on the 5-celled von Neumann neighborhood. A272453

Numbers n such that n | 9ⁿ + 7ⁿ + 5ⁿ + 3ⁿ +1. A57831