Properties of the Number 71236

Seventy-One Thousand Two Hundred Thirty-Six

Basics

Value: 71235 → 71236 → 71237

Parity: even

Prime: No

Previous Prime: 71233

Next Prime: 71237

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 11 × 1619

Divisors: 1, 2, 4, 11, 22, 44, 1619, 3238, 6476, 17809

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10001011001000100

Octal: 213104

Duodecimal: 35284

Hexadecimal: 11644

Square: 5074567696

Square Root: 266.90073060971565

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

Indices of primes in sequence defined by A(0) = 59, A(n) = 10·A(n-1) - 81 for n > 0. A101569

Number of n-bead necklaces labeled with numbers 1..6 allowing reversal, with no adjacent beads differing by more than 1. A208719

θ series of A*_10 lattice. A23922

G.f. A(x) satisfies A(x) = 1 + x/A(x)² * (1 - A(x) + A(x)³). A377705

a(n) = (1/5ⁿ) * ∑_k=0..n² ( (binomial(n², k) * 4^k) (mod 5ⁿ) ). A376534

a(n) = (n¹⁰ + n⁵)/2. A71236

a(n) begins the first chain of 9 consecutive positive integers of h-values with symmetrical gaps about the center, where h(k) is the length of the finite sequence k, f(k), f(f(k)), ...., 1 in the Collatz (or 3x + 1) problem. A268288