Properties of the Number 61685

Sixty-One Thousand Six Hundred Eighty-Five

Basics

Value: 61684 → 61685 → 61686

Parity: odd

Prime: No

Previous Prime: 61681

Next Prime: 61687

Digit Sum: 26

Digital Root: 8

Palindrome: No

Factorization: 5 × 13 ² × 73

Divisors: 1, 5, 13, 65, 73, 169, 365, 845, 949, 4745

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111000011110101

Octal: 170365

Duodecimal: 2B845

Hexadecimal: f0f5

Square: 3805039225

Square Root: 248.3646512690564

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 paraffins (see Losanitsch reference for precise definition). A6010

a(n) is the smallest k such that number of non-unitary prime divisors of central binomial coefficient, A000984(k) = C(2·k,k) equals n. A81393

Generalized Bell numbers: column 4 of A275043. A61685