Properties of the Number 28921

Twenty-Eight Thousand Nine Hundred Twenty-One

Basics

Value: 28920 → 28921 → 28922

Parity: odd

Prime: Yes

Previous Prime: 28909

Next Prime: 28927

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 28921

Divisors: 1, 28921

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111000011111001

Octal: 70371

Duodecimal: 148A1

Hexadecimal: 70f9

Square: 836424241

Square Root: 170.06175348972502

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

a(n) = n³ + 2·n² + 4·n + 1. A270867

Primes that are palindromic in base 5. A29973

Numbers k such that k, k+1, k+2 and k+3 are 1,2,3,4-almost primes. A113000

Primes which remain prime after one and after two applications of the rotate-and-add operation of A086002. A86003

Primes of the form 8·n² + 2·n + 1. A188382

A sequence with Somos-4 Hankel transform. A171416

Base-10 representation of 1 and the primes at A262641. A262642

Number of pairs (c, y) where c is an integer composition and y is an integer partition and y can be obtained from c by choosing a partition of each part, flattening, and sorting. A318567

Primes p such that four consecutive primes starting with p are congruent to {1,2,3,4} (mod 5). A215607

Number of weakly unimodal compositions of n in which the greatest part occurs exactly four times. A320315