Properties of the Number 86540

Eighty-Six Thousand Five Hundred Forty

Basics

Value: 86539 → 86540 → 86541

Parity: even

Prime: No

Previous Prime: 86539

Next Prime: 86561

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 5 × 4327

Divisors: 1, 2, 4, 5, 10, 20, 4327, 8654, 17308, 21635

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10101001000001100

Octal: 251014

Duodecimal: 420B8

Hexadecimal: 1520c

Square: 7489171600

Square Root: 294.1768175774563

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

Numbers which are the sum of their proper divisors containing the digit 3. A59462

Numbers k such that k has nonincreasing digits and the k-th prime has nondecreasing digits. A116069

Difference between numerator and denominator of the sum of all matrix elements of n X n Hilbert matrix M(i,j)=1/(i+j-1) (i,j = 1..n), A117731[n] - A117664[n]. A119030

Irregular table read by rows: Take a decagon with all diagonals drawn, as in A333139. Then T(n,k) = number of k-sided polygons in that figure for k >= 3. A332417

Numbers n such that n and n+1 both are members of A074997; i.e., on the one hand n-1 and n+1 have the same prime signature, on the other hand n and n+2 have the same prime signature. A86540