12705385 has 32 divisors (see below), whose sum is σ = 19355904. Its totient is φ = 7776000.

The previous prime is 12705377. The next prime is 12705397. The reversal of 12705385 is 58350721.

It is not a de Polignac number, because 12705385 - 2³ = 12705377 is a prime.

It is a super-2 number, since 2×12705385² = 322853615996450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

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 31 ways as a sum of consecutive naturals, for example, 23215 + ... + 23755.

It is an arithmetic number, because the mean of its divisors is an integer number (604872).

Almost surely, 2^12705385 is an apocalyptic number.

It is an amenable number.

12705385 is a deficient number, since it is larger than the sum of its proper divisors (6650519).

12705385 is a wasteful number, since it uses less digits than its factorization.

12705385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 12705385 is about 3564.4613898877. The cubic root of 12705385 is about 233.3436265300.

The spelling of 12705385 in words is "twelve million, seven hundred five thousand, three hundred eighty-five".