Properties of the Number 12209

Twelve Thousand Two Hundred Nine

Basics

Value: 12208 → 12209 → 12210

Parity: odd

Prime: No

Previous Prime: 12203

Next Prime: 12211

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 29 × 421

Divisors: 1, 29, 421, 12209

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10111110110001

Octal: 27661

Duodecimal: 7095

Hexadecimal: 2fb1

Square: 149059681

Square Root: 110.4943437466371

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

a(n) = n*(n² + 1)/2. A6003

Rhombic dodecahedral numbers: a(n) = n⁴ - (n - 1)⁴. A5917

a(n) = (1/2)*(n³ + n*(n mod 2)). A317614

a(n) = 110·a(n-1) - a(n-2) for n >= 2, a(0)=1, a(1)=111. A298677

Number of integer partitions of n having no permutation with all equal run-lengths. A382915

Pseudoprimes to base 6. A5937

Sum of terms in each group in A074147. A74149

Odd composite integers m such that A014448(m) == 4 (mod m). A335670

Euler pseudoprimes to base 6: composite integers such that abs(6^{(n - 1}/2)) == 1 mod n. A262053

Odd composite integers m such that A004254(m-J(m,21)) == 0 (mod m) and gcd(m,21)=1, where J(m,21) is the Jacobi symbol. A340098