12189205 has 16 divisors (see below), whose sum is σ = 17034624. Its totient is φ = 8199360.

The previous prime is 12189181. The next prime is 12189257. The reversal of 12189205 is 50298121.

12189205 = T₁₆₁ + T₁₆₂ + ... + T₄₂₅.

It is not a de Polignac number, because 12189205 - 2¹⁷ = 12058133 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1431 + ... + 5140.

It is an arithmetic number, because the mean of its divisors is an integer number (1064664).

Almost surely, 2^12189205 is an apocalyptic number.

It is an amenable number.

12189205 is a deficient number, since it is larger than the sum of its proper divisors (4845419).

12189205 is an equidigital number, since it uses as much as digits as its factorization.

12189205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6636.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 12189205 is about 3491.3041975743. The cubic root of 12189205 is about 230.1398330529.

The spelling of 12189205 in words is "twelve million, one hundred eighty-nine thousand, two hundred five".