Properties of the Number 81004

Eighty-One Thousand Four

Basics

Value: 81003 → 81004 → 81005

Parity: even

Prime: No

Previous Prime: 81001

Next Prime: 81013

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 7 × 11 × 263

Divisors: 1, 2, 4, 7, 11, 14, 22, 28, 44, 77

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011110001101100

Octal: 236154

Duodecimal: 3AA64

Hexadecimal: 13c6c

Square: 6561648016

Square Root: 284.61201661208895

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 n-bead bracelets (turnover necklaces) of two colors with 6 red beads and n-6 black beads. A5513

Trajectory of 5 under repeated application of x -> A306938(x). A306943

∑_k=2..n min(k,n-k)*φ(k)*(n-k). A92274

Series inversion of A007296. A187111

a(n) = Fibonacci(4n+2) + 1, or Fibonacci(2n+2)*Lucas(2n). A81004