Properties of the Number 12189

Twelve Thousand One Hundred Eighty-Nine

Basics

Value: 12188 → 12189 → 12190

Parity: odd

Prime: No

Previous Prime: 12163

Next Prime: 12197

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 17 × 239

Divisors: 1, 3, 17, 51, 239, 717, 4063, 12189

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10111110011101

Octal: 27635

Duodecimal: 7079

Hexadecimal: 2f9d

Square: 148571721

Square Root: 110.40380428228005

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) = ∑_k=1..n gcd(k, n)³. A343497

Truncated square pyramid numbers: a(n) = ∑_{k = n..2·n} k². A50409

Numbers k such that A057775(k) is the factor of a Fermat number 2^{2^m} + 1 for some m. A201364

a(n) = ∑_{k=0..floor(n/2)} (n-k)². A129371

Nonprime integers n such that n divides A120492(n). A120329

Products of two distinct tribonacci numbers > 1. A274433

Number of 2 X 2 matrices with all elements in {0,...,n} and prime determinant. A281315

Start with an equilateral triangle, and repeatedly append along the triangles of the previous step equilateral triangles with half their side length that do not overlap with any prior triangle; a(n) gives the number of triangles appended at n-th step. A321257

Indices of primes in sequence defined by A(0) = 67, A(n) = 10·A(n-1) + 27 for n > 0. A101542

Numbers whose trajectory under the Esucarys map ends at the fixed point 247. A129133