Properties of the Number 12206

Twelve Thousand Two Hundred Six

Basics

Value: 12205 → 12206 → 12207

Parity: even

Prime: No

Previous Prime: 12203

Next Prime: 12211

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 2 × 17 × 359

Divisors: 1, 2, 17, 34, 359, 718, 6103, 12206

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10111110101110

Octal: 27656

Duodecimal: 7092

Hexadecimal: 2fae

Square: 148986436

Square Root: 110.48076755707302

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 k²⁵⁶ + 1 is prime. A56995

Numbers n such that φ(n) = φ(n-1) - φ(n-2). A66231

(prime(n)*(prime(n+1)-1) + (prime(n)-1)*prime(n+1)) / 2. A99909

a(n) = ∑_{k=0..floor(2·n/5)} (k+1) * binomial(k,2·n-5·k). A392268

a(n) = ∑_{k=0..floor(3·n/5)} (k+1) * binomial(k,3·n-5·k). A392311

Numerators of continued fraction convergents to sqrt(695). A42336

Least positive integer m such that prime(m+n) divides 2^m - 1. A248626

"DHK" (bracelet, identity, unlabeled) transform of 1,0,1,0,... (odd). A32243

The A161671(n)-th partial sum of A161671. A161778

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 49", based on the 5-celled von Neumann neighborhood. A270016