Properties of the Number 21286

Twenty-One Thousand Two Hundred Eighty-Six

Basics

Value: 21285 → 21286 → 21287

Parity: even

Prime: No

Previous Prime: 21283

Next Prime: 21313

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 × 29 × 367

Divisors: 1, 2, 29, 58, 367, 734, 10643, 21286

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001100100110

Octal: 51446

Duodecimal: 1039A

Hexadecimal: 5326

Square: 453093796

Square Root: 145.89722409970656

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

Pascal-(1,8,1) array. A143683

Expansion of 1/(sqrt(1-4·x)*sqrt(1-16·x)). A307695

Difference between partial sums of partition numbers (A026905) and partial sums of numbers of partitions into distinct parts (A026906). A56870

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 510", based on the 5-celled von Neumann neighborhood. A272700

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 577", based on the 5-celled von Neumann neighborhood. A273024

Fibonacci sequence starting 154, 144. A278708

1/4 the number of (n+1)X3 0..3 arrays with every 2X2 subblock having one or three distinct clockwise edge differences. A210071

Decimal expansion of 1/282. A21286