Properties of the Number 81842

Eighty-One Thousand Eight Hundred Forty-Two

Basics

Value: 81841 → 81842 → 81843

Parity: even

Prime: No

Previous Prime: 81839

Next Prime: 81847

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 × 151 × 271

Divisors: 1, 2, 151, 271, 302, 542, 40921, 81842

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011111110110010

Octal: 237662

Duodecimal: 3B442

Hexadecimal: 13fb2

Square: 6698112964

Square Root: 286.0804082771136

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 nX5 0..1 arrays with every element equal to 0, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero. A299578

T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero. A299581

a(1)=0, a(n)=a(n-1)+4 if n is already in the sequence, a(n)=a(n-1)+3 otherwise. A81842