12728185 has 16 divisors (see below), whose sum is σ = 15857856. Its totient is φ = 9799488.

The previous prime is 12728179. The next prime is 12728203. The reversal of 12728185 is 58182721.

It is a de Polignac number, because none of the positive numbers 2^k-12728185 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12728185.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19474 + ... + 20116.

It is an arithmetic number, because the mean of its divisors is an integer number (991116).

Almost surely, 2^12728185 is an apocalyptic number.

It is an amenable number.

12728185 is a deficient number, since it is larger than the sum of its proper divisors (3129671).

12728185 is a wasteful number, since it uses less digits than its factorization.

12728185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 792.

The product of its digits is 8960, while the sum is 34.

The square root of 12728185 is about 3567.6581955114. The cubic root of 12728185 is about 233.4831226424.

The spelling of 12728185 in words is "twelve million, seven hundred twenty-eight thousand, one hundred eighty-five".