Properties of the Number 81238

Eighty-One Thousand Two Hundred Thirty-Eight

Basics

Value: 81237 → 81238 → 81239

Parity: even

Prime: No

Previous Prime: 81233

Next Prime: 81239

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 151 × 269

Divisors: 1, 2, 151, 269, 302, 538, 40619, 81238

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110101010110

Octal: 236526

Duodecimal: 3B01A

Hexadecimal: 13d56

Square: 6599612644

Square Root: 285.0228061050554

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) = floor(3rd elementary symmetric function of ∑_j=1..k 1/j, k = 1,2,...,n). A25213

Number of mobiles (circular rooted trees) with n nodes and 4 leaves. A55342

#{(i,j): μ(i)*μ(j) = -1, 1 <= i <= n, 1 <= j <= n}, where μ=A008683 (Moebius function). A81238