12705745 has 16 divisors (see below), whose sum is σ = 16773120. Its totient is φ = 9180864.

The previous prime is 12705731. The next prime is 12705757. The reversal of 12705745 is 54750721.

12705745 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12705745 - 2⁷ = 12705617 is a prime.

It is a super-2 number, since 2×12705745² = 322871912010050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 976 + ... + 5134.

It is an arithmetic number, because the mean of its divisors is an integer number (1048320).

Almost surely, 2^12705745 is an apocalyptic number.

It is an amenable number.

12705745 is a deficient number, since it is larger than the sum of its proper divisors (4067375).

12705745 is a wasteful number, since it uses less digits than its factorization.

12705745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4224.

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 12705745 is about 3564.5118880430. The cubic root of 12705745 is about 233.3458303964.

The spelling of 12705745 in words is "twelve million, seven hundred five thousand, seven hundred forty-five".