Properties of the Number 81284

Eighty-One Thousand Two Hundred Eighty-Four

Basics

Value: 81283 → 81284 → 81285

Parity: even

Prime: No

Previous Prime: 81283

Next Prime: 81293

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 7 × 2903

Divisors: 1, 2, 4, 7, 14, 28, 2903, 5806, 11612, 20321

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110110000100

Octal: 236604

Duodecimal: 3B058

Hexadecimal: 13d84

Square: 6607088656

Square Root: 285.10348998214664

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

G.f. satisfies: A(x) = 1 + x*∑_n>=0 (A(x)⁴ - 1)ⁿ. A192947

Numerators of continued fraction convergents to sqrt(106). A41190

Binomial transform of [1, 5, 10, 10, 5, 1, 1, -1, 1, -1, 1, ...]. A140228

Number of 4-step one or two space at a time bishop's tours on an n X n board summed over all starting positions. A187048

An interleaved sequence of pyramidal and polygonal numbers. A81284

Number of nX2 0..4 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of elements above it, modulo 5. A239250