Properties of the Number 7161

Seven Thousand One Hundred Sixty-One

Basics

Value: 7160 → 7161 → 7162

Parity: odd

Prime: No

Previous Prime: 7159

Next Prime: 7177

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 7 × 11 × 31

Divisors: 1, 3, 7, 11, 21, 31, 33, 77, 93, 217

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1101111111001

Octal: 15771

Duodecimal: 4189

Hexadecimal: 1bf9

Square: 51279921

Square Root: 84.62269199216011

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

The non-repetitive Kaprekar binary numbers in decimal. A163205

Denominators of cosecant numbers: -2*(2^2·n-1-1)*Bernoulli(2·n). A1897

10-factorial numbers. A45757

a(n) = ∏_{p-1 divides n} p, where p is an odd prime. A141459

Numbers k such that the decimal number 1k is a square. A272671

Pascal-(1,7,1) array. A81582

Number of semi-lone-child-avoiding rooted trees with at most one distinct non-leaf branch directly under any vertex. A331933

a(n) = 7·n² + 14·n. A67727

-9-Knödel numbers. A225513

Expansion of x/((1-x-x³)*(1-x)⁸). A144902