Properties of the Number 81261

Eighty-One Thousand Two Hundred Sixty-One

Basics

Value: 81260 → 81261 → 81262

Parity: odd

Prime: No

Previous Prime: 81239

Next Prime: 81281

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 9029

Divisors: 1, 3, 9, 9029, 27087, 81261

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110101101101

Octal: 236555

Duodecimal: 3B039

Hexadecimal: 13d6d

Square: 6603350121

Square Root: 285.0631508981826

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

Shifts 3 places left under Euler transform with a(0)=0 and a(n)=1 for n < 3. A218020

Total number of parts of multiplicity 3 in all partitions of n. A117524

Numbers k such that f(k²) = k, where f is Eric Angelini's remove-repeated-digits map x->A320486(x). A321010

Start with a(1)=4; apply 4 -> 665, 5 -> 56665, 6 -> 566665; iterate. A81261