Properties of the Number 72405

Seventy-Two Thousand Four Hundred Five

Basics

Value: 72404 → 72405 → 72406

Parity: odd

Prime: No

Previous Prime: 72383

Next Prime: 72421

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 5 × 1609

Divisors: 1, 3, 5, 9, 15, 45, 1609, 4827, 8045, 14481

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10001101011010101

Octal: 215325

Duodecimal: 35A99

Hexadecimal: 11ad5

Square: 5242484025

Square Root: 269.08177195789386

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 compositions of the integer n into positive parts that avoid a fixed pattern of three letters. A102726

Number of 3-connected nets with n edges. A2880

Number of sets of exactly n positive integers <= n+6 having a square element sum. A281969

Triangle T(n, k) = C(n,k) - C(n-2,k-1) for n >= 3 and T(n, k) = 1 otherwise, read by rows. A72405