Properties of the Number 81274

Eighty-One Thousand Two Hundred Seventy-Four

Basics

Value: 81273 → 81274 → 81275

Parity: even

Prime: No

Previous Prime: 81239

Next Prime: 81281

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 40637

Divisors: 1, 2, 40637, 81274

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110101111010

Octal: 236572

Duodecimal: 3B04A

Hexadecimal: 13d7a

Square: 6605463076

Square Root: 285.08595195133694

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

Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 81. A31669

Table read by antidiagonals: T(w,n) is the number of n-step self avoiding walks on a 3D cubic lattice confined inside a tube of cross section 2w X 2w where the walk starts at the middle of the tube. A337400

Number of nX4 0..1 arrays with each 1 adjacent to 1, 3 or 5 king-move neighboring 1s. A296948

Duplicate of A038764. A81274