Properties of the Number 16561

Sixteen Thousand Five Hundred Sixty-One

Basics

Value: 16560 → 16561 → 16562

Parity: odd

Prime: Yes

Previous Prime: 16553

Next Prime: 16567

Digit Sum: 19

Digital Root: 1

Palindrome: Yes

Factorization: 16561

Divisors: 1, 16561

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100000010110001

Octal: 40261

Duodecimal: 9701

Hexadecimal: 40b1

Square: 274266721

Square Root: 128.68954891520912

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

Palindromic primes: prime numbers whose decimal expansion is a palindrome. A2385

Primes of the form 2·n² - 1. A66436

Palindromic in bases 7 and 10. A29964

Quartan primes: primes of the form x⁴ + y⁴, x > 0, y > 0. A2645

Balanced primes of order five. A96697

Primes of the form n⁴ + (n+1)⁴. A152913

Primes of form n² + 6561. A256837

Primes of form n² + 10000. A256838

4-dimensional centered cube numbers. A8514

Generalized Fermat primes of the form (k+1)²^m + k²^m, with m>1. A78902