12189215 has 8 divisors (see below), whose sum is σ = 14938560. Its totient is φ = 9543712.

The previous prime is 12189181. The next prime is 12189257. The reversal of 12189215 is 51298121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12189215 - 2¹⁰ = 12188191 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25700 + ... + 26169.

It is an arithmetic number, because the mean of its divisors is an integer number (1867320).

Almost surely, 2^12189215 is an apocalyptic number.

12189215 is a deficient number, since it is larger than the sum of its proper divisors (2749345).

12189215 is an equidigital number, since it uses as much as digits as its factorization.

12189215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51921.

The product of its digits is 1440, while the sum is 29.

The square root of 12189215 is about 3491.3056297036. The cubic root of 12189215 is about 230.1398959883.

The spelling of 12189215 in words is "twelve million, one hundred eighty-nine thousand, two hundred fifteen".