Properties of the Number 72381

Seventy-Two Thousand Three Hundred Eighty-One

Basics

Value: 72380 → 72381 → 72382

Parity: odd

Prime: No

Previous Prime: 72379

Next Prime: 72383

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 23 × 1049

Divisors: 1, 3, 23, 69, 1049, 3147, 24127, 72381

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 10001101010111101

Octal: 215275

Duodecimal: 35A79

Hexadecimal: 11abd

Square: 5239009161

Square Root: 269.0371721528458

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

Number of deco polyominoes of height n and vertical height 3 (i.e., having 3 rows). A121693

a(n) is the floor of the reciprocal of the difference between the 10ⁿ-th root of 10ⁿ and 1. A141492

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 0), (0, 1, -1), (1, 0, -1), (1, 1, 1)}. A149660

Numbers m such that Fibonacci(m) is a semiprime. A72381

a(n) is the numerator of the probability that the procedure described in A372422 successfully ends with the selection of a single person, starting with n persons. A372482

Number of 6-member subsets of [6·n] whose elements sum to a multiple of n. A318627