Properties of the Number 81285

Eighty-One Thousand Two Hundred Eighty-Five

Basics

Value: 81284 → 81285 → 81286

Parity: odd

Prime: No

Previous Prime: 81283

Next Prime: 81293

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 5 × 5419

Divisors: 1, 3, 5, 15, 5419, 16257, 27095, 81285

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110110000101

Octal: 236605

Duodecimal: 3B059

Hexadecimal: 13d85

Square: 6607251225

Square Root: 285.1052437258915

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

Least number·such that xⁿ has n digits equal to k. Case k=5. A285452

Table of coefficients of polynomials f_n(q) defined by 1/∏_i>=1 (1-a qⁱ)ⁱ = ∑_n>=0 aⁿ qⁿ f_n(q) / ((q)_n)², where (x)_n is the q-Pochhammer symbol, defined to be ∏_i=0..n-1 (1-x qⁱ). A81285