Properties of the Number 65985

Sixty-Five Thousand Nine Hundred Eighty-Five

Basics

Value: 65984 → 65985 → 65986

Parity: odd

Prime: No

Previous Prime: 65983

Next Prime: 65993

Digit Sum: 33

Digital Root: 6

Palindrome: No

Factorization: 3 × 5 × 53 × 83

Divisors: 1, 3, 5, 15, 53, 83, 159, 249, 265, 415

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10000000111000001

Octal: 200701

Duodecimal: 32229

Hexadecimal: 101c1

Square: 4354020225

Square Root: 256.87545620397447

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

Expansion of exp( ∑_{n >= 1} A000281(n)*xⁿ/n ). A255883

Square array read by antidiagonals upwards: the n-th row o.g.f. is exp( ∑_{i >= 1} c(n,i)*xⁱ/i ) for n >= 1, where c(n,k) is Shanks' array of generalized Euler and class numbers. A262143

Numbers k such that d(k) / 2 is prime, where d(k) = number of divisors of k. A65985