Properties of the Number 69281

Sixty-Nine Thousand Two Hundred Eighty-One

Basics

Value: 69280 → 69281 → 69282

Parity: odd

Prime: No

Previous Prime: 69263

Next Prime: 69313

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 29 × 2389

Divisors: 1, 29, 2389, 69281

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000111010100001

Octal: 207241

Duodecimal: 34115

Hexadecimal: 10ea1

Square: 4799856961

Square Root: 263.2128416320146

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) = n·a(n-1) + 1, a(0) = 0. A2627

a(n) = numerator(∑_k=1..n 1/k!). A120265

Each term in the table is the product of the two terms above it + 1. A59922

Coefficients of a new recursive polynomial: a = 11; b = 19; c = -8; r(x,n)=(a·x + b)*r(x, n - 1) + c·r(x, n - 2). A146751

Triangle read by rows: T(n,k) = ∑_j=0..k binomial(n,j) * j! (0 <= k <= n). A347667

20-almost primes (generalization of semiprimes). A69281

a(0)=1. a(n+1) = a(floor(n/a(n))) + 1. A130147