Properties of the Number 18725

Eighteen Thousand Seven Hundred Twenty-Five

Basics

Value: 18724 → 18725 → 18726

Parity: odd

Prime: No

Previous Prime: 18719

Next Prime: 18731

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 5 ² × 7 × 107

Divisors: 1, 5, 7, 25, 35, 107, 175, 535, 749, 2675

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100100100100101

Octal: 44445

Duodecimal: AA05

Hexadecimal: 4925

Square: 350625625

Square Root: 136.83932183404008

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

Expansion of 1/(1 - x - x² - 2·x³). A77947

Numbers k such that the k-th standard ordered rooted tree is a generalized Bethe tree (counted by A003238). A358377

a(n) = ∑_d∣n φ(d³). A68963

T(n,k)=Number of (n+1)X(k+1) arrays of permutations of 0..(n+1)*(k+1)-1 with each element having directed index change 0,0 1,1 0,-1 -1,1 or 0,-2. A264244

Number of cubic residues mod 2ⁿ. A46630

T(n,k)=Number of nXk 0..1 arrays with every element unequal to 0, 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A320409

a(n) = a(n-1) + a(n-2) + 2·a(n-3) with a(0)=2, a(1)=1, a(2)=5. A226308

Number of partitions of n such that the multiplicity of the number of parts is a part. A240499

Number of partitions p of n such that floor(mean(p)) is a part and ceiling(mean(p)) is not. A241342

Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 926", based on the 5-celled von Neumann neighborhood. A290678