Properties of the Number 21460

Twenty-One Thousand Four Hundred Sixty

Basics

Value: 21459 → 21460 → 21461

Parity: even

Prime: No

Previous Prime: 21433

Next Prime: 21467

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 5 × 29 × 37

Divisors: 1, 2, 4, 5, 10, 20, 29, 37, 58, 74

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001111010100

Octal: 51724

Duodecimal: 10504

Hexadecimal: 53d4

Square: 460531600

Square Root: 146.4923206178399

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 ∏_k>=1 1 / ((1 - x^k) * (1 - x^k³)). A369579

a(n) = n⁴ + 5·n² + 4. A156798

a(n) = 1123 + 21460·n. A69984

a(n) = 5·a(n-1) + 4·a(n-2), with a(0) = 4, a(1) = 4. A106567

a(n) = n·A007504(n)/2 = n*(sum of first n primes)/2. A156778

Numbers k such that (3^k + 3·k)/3 is prime. A370658

Number of walks within N² (the first quadrant of Z²) starting at (0,0), ending on the vertical axis and consisting of n steps taken from {(-1, -1), (0, -1), (0, 1), (1, -1), (1, 0), (1, 1)}. A151482

Decimal expansion of 1/456. A21460