Properties of the Number 21250

Twenty-One Thousand Two Hundred Fifty

Basics

Value: 21249 → 21250 → 21251

Parity: even

Prime: No

Previous Prime: 21247

Next Prime: 21269

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 2 × 5 ⁴ × 17

Divisors: 1, 2, 5, 10, 17, 25, 34, 50, 85, 125

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001100000010

Octal: 51402

Duodecimal: 1036A

Hexadecimal: 5302

Square: 451562500

Square Root: 145.7737973711325

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

Indices of primes in A141523. A235862

Second binomial transform of F(n+1). A81567

Numbers k such that k | 13^k + 1. A15963

Number of paths of length n starting at initial node of the path graph P₉. A178381

Expansion of ∏_m>=1 ((1+q^2·m-1)/(1+q^2·m))⁶. A29843

Number of polyhexes with n cells that tile the plane isohedrally but not by translation or by 180-degree rotation (Conway criterion). A75213

Expansion of bracket function. A750

a(n) = n³ + 2·n² + 4·n + 1. A270867

Numbers that are the sum of five fourth powers in three or more ways. A344243

Numbers that are the sum of five fourth powers in exactly three ways. A344244