Properties of the Number 81248

Eighty-One Thousand Two Hundred Forty-Eight

Basics

Value: 81247 → 81248 → 81249

Parity: even

Prime: No

Previous Prime: 81239

Next Prime: 81281

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ⁵ × 2539

Divisors: 1, 2, 4, 8, 16, 32, 2539, 5078, 10156, 20312

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10011110101100000

Octal: 236540

Duodecimal: 3B028

Hexadecimal: 13d60

Square: 6601237504

Square Root: 285.0403480211179

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

Values that show the slow decrease in the Andrica function Af(k) = sqrt(p(k+1)) - sqrt(p(k)), where p(k) denotes the k-th prime. A84977

Concatenation of n and a list of the divisors of n. A137464

Number of 10-length words w over n-ary alphabet such that for every prefix z of w we have #(z,a_i) = 0 or #(z,a_i) >= #(z,a_j) for all j>i and #(z,a_i) counts the occurrences of the i-th letter in z. A213289

Number of numbers 1<=k<=n with μ(k+n)+μ(k)=0, where μ=A008683 (Moebius function). A81248