Properties of the Number -161721

One Hundred Sixty-One Thousand Seven Hundred Twenty-One

Basics

Value: -161722 → -161721 → -161720

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 7 × 17 × 151

Divisors: 1, 3, 7, 9, 17, 21, 51, 63, 119, 151

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100111011110111001

Octal: -473671

Duodecimal: -79709

Hexadecimal: -277b9

Square: 26153681841

Square Root: 402.1454960583296

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

Constant term in the reduction of the n-th Fibonacci polynomial by x³->x²+2x+1. A192772

Pseudoprimes to base 8 that are not squarefree. A243090

Principal diagonal of the convolution array A213561. A213562