Properties of the Number 72145

Seventy-Two Thousand One Hundred Forty-Five

Basics

Value: 72144 → 72145 → 72146

Parity: odd

Prime: No

Previous Prime: 72139

Next Prime: 72161

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 5 × 47 × 307

Divisors: 1, 5, 47, 235, 307, 1535, 14429, 72145

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10001100111010001

Octal: 214721

Duodecimal: 35901

Hexadecimal: 119d1

Square: 5204901025

Square Root: 268.5982129501237

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

Strictly superdiagonal compositions: compositions (p1, p2, p3, ...) of n such that π > i. A238874

Number of fixed poly-[4.6.12]-tiles (holes allowed) with n cells (division into triangles is significant). A197464

Triangle read by rows: T(n,k) is the number of bargraphs of semiperimeter n having k levels. A level in a bargraph is a maximal sequence of two or more adjacent horizontal steps; it is preceded and followed by either an up step or a down step. A273344

a(n) = 11·3ⁿ - 2·n - 10. A116972

Numbers k such that the period of the 'Reverse and Subtract' trajectory of k is greater than 14. A72145