Properties of the Number 72540

Seventy-Two Thousand Five Hundred Forty

Basics

Value: 72539 → 72540 → 72541

Parity: even

Prime: No

Previous Prime: 72533

Next Prime: 72547

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ² × 3 ² × 5 × 13 × 31

Divisors: 1, 2, 3, 4, 5, 6, 9, 10, 12, 13

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001101101011100

Octal: 215534

Duodecimal: 35B90

Hexadecimal: 11b5c

Square: 5262051600

Square Root: 269.3325082495613

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) = A062402(2ⁿ+1). A96856

Number of permutations of [2n+5] in which the longest increasing run has length n+5. A230345

Number of permutations of [n] in which the longest increasing run has length 9. A230235

a(n) = ((2^b-1)/φ(n))*∑_d∣n Moebius(n/d)*d^b-1 for b = 5. A160894

Regular coverings having dihedral voltage groups: see Kwak-Lee reference in A160870 for precise definition. A160879

Numbers that are not differences between successive Ulam numbers (A002858). A72540