12189885 has 32 divisors (see below), whose sum is σ = 20632320. Its totient is φ = 6133248.

The previous prime is 12189871. The next prime is 12189907. The reversal of 12189885 is 58898121.

It is not a de Polignac number, because 12189885 - 2⁴ = 12189869 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 (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30507 + ... + 30903.

It is an arithmetic number, because the mean of its divisors is an integer number (644760).

Almost surely, 2^12189885 is an apocalyptic number.

12189885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12189885 is a deficient number, since it is larger than the sum of its proper divisors (8442435).

12189885 is a wasteful number, since it uses less digits than its factorization.

12189885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517.

The product of its digits is 46080, while the sum is 42.

The square root of 12189885 is about 3491.4015810273. The cubic root of 12189885 is about 230.1441125821.

The spelling of 12189885 in words is "twelve million, one hundred eighty-nine thousand, eight hundred eighty-five".