Properties of the Number 72721

Seventy-Two Thousand Seven Hundred Twenty-One

Basics

Value: 72720 → 72721 → 72722

Parity: odd

Prime: No

Previous Prime: 72719

Next Prime: 72727

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 11 ² × 601

Divisors: 1, 11, 121, 601, 6611, 72721

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001110000010001

Octal: 216021

Duodecimal: 36101

Hexadecimal: 11c11

Square: 5288343841

Square Root: 269.6683147868878

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 k such that k * (k + 7) is the concatenation of a number m with itself. A116291

The least number s having exactly n fours in the continued fraction of sqrt(s). A206584

a(n) = (n² - n + 2) * (5·n² - 5·n + 2) / 4. A380353

Expansion of g.f. x*(1 - x)*(1 + x)/((x² + 3·x + 1)*(x² - 4·x + 1)). A171067

Numbers n such that n, n + 1, n + 2, n + 3 and n + 4 are products of exactly three primes. A268588

Number of partitions of n into parts which are each positive powers of a single number >1 (which may vary between partitions). A72721