12185985 has 32 divisors (see below), whose sum is σ = 22809600. Its totient is φ = 5439168.

The previous prime is 12185981. The next prime is 12186001. The reversal of 12185985 is 58958121.

12185985 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12185985 - 2² = 12185981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12185981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3166 + ... + 5864.

It is an arithmetic number, because the mean of its divisors is an integer number (712800).

Almost surely, 2^12185985 is an apocalyptic number.

12185985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12185985 is a deficient number, since it is larger than the sum of its proper divisors (10623615).

12185985 is a wasteful number, since it uses less digits than its factorization.

12185985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2757.

The product of its digits is 28800, while the sum is 39.

The square root of 12185985 is about 3490.8430213918. The cubic root of 12185985 is about 230.1195660619.

The spelling of 12185985 in words is "twelve million, one hundred eighty-five thousand, nine hundred eighty-five".