Properties of the Number 8281

Eight Thousand Two Hundred Eighty-One

Basics

Value: 8280 → 8281 → 8282

Parity: odd

Prime: No

Previous Prime: 8273

Next Prime: 8287

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 7 ² × 13 ²

Divisors: 1, 7, 13, 49, 91, 169, 637, 1183, 8281

Polygonal

Triangular: No

Square: Yes

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000001011001

Octal: 20131

Duodecimal: 4961

Hexadecimal: 2059

Square: 68574961

Square Root: 91

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

Odd squares: a(n) = (2n+1)². Also centered octagonal numbers. A16754

Sum of first n cubes; or n-th triangular number squared. A537

Squares of the squarefree semiprimes (p²*q²). A85986

a(n) = σ(n)². A72861

Powers of composite squarefree numbers that are not squarefree. A303606

a(n) = (3·n+1)². A16778

a(n) = (6·n + 1)². A16922

a(n) = (1/4)*floor(n/2)*floor((n-1)/2)*floor((n-2)/2)*floor((n-3)/2). A28723

Numbers with 9 divisors. A30627

Products of squares of 2 or more distinct primes. A177492