Properties of the Number 61521

Sixty-One Thousand Five Hundred Twenty-One

Basics

Value: 61520 → 61521 → 61522

Parity: odd

Prime: No

Previous Prime: 61519

Next Prime: 61543

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 20507

Divisors: 1, 3, 20507, 61521

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1111000001010001

Octal: 170121

Duodecimal: 2B729

Hexadecimal: f051

Square: 3784833441

Square Root: 248.03427182548785

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 nondecreasing sequences of 5 1..n integers with no element dividing the sequence sum. A212872

Regular coverings having dihedral voltage groups: see Kwak-Lee reference in A160870 for precise definition. A160888

a(0) = 1; a(n) is obtained by incrementing each digit of a(n-1) by 6. A61521