12189245 has 4 divisors (see below), whose sum is σ = 14627100. Its totient is φ = 9751392.

The previous prime is 12189181. The next prime is 12189257. The reversal of 12189245 is 54298121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7198489 + 4990756 = 2683^2 + 2234^2 .

It is a cyclic number.

It is not a de Polignac number, because 12189245 - 2⁶ = 12189181 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 3 ways as a sum of consecutive naturals, for example, 1218920 + ... + 1218929.

It is an arithmetic number, because the mean of its divisors is an integer number (3656775).

Almost surely, 2^12189245 is an apocalyptic number.

It is an amenable number.

12189245 is a deficient number, since it is larger than the sum of its proper divisors (2437855).

12189245 is an equidigital number, since it uses as much as digits as its factorization.

12189245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2437854.

The product of its digits is 5760, while the sum is 32.

The square root of 12189245 is about 3491.3099260879. The cubic root of 12189245 is about 230.1400847944.

The spelling of 12189245 in words is "twelve million, one hundred eighty-nine thousand, two hundred forty-five".