12517945 has 32 divisors (see below), whose sum is σ = 17233920. Its totient is φ = 8648640.

The previous prime is 12517943. The next prime is 12517961. The reversal of 12517945 is 54971521.

12517945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12517945 - 2¹ = 12517943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12517945.

It is not an unprimeable number, because it can be changed into a prime (12517943) 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, 158416 + ... + 158494.

It is an arithmetic number, because the mean of its divisors is an integer number (538560).

Almost surely, 2^12517945 is an apocalyptic number.

It is an amenable number.

12517945 is a deficient number, since it is larger than the sum of its proper divisors (4715975).

12517945 is a wasteful number, since it uses less digits than its factorization.

12517945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205.

The product of its digits is 12600, while the sum is 34.

The square root of 12517945 is about 3538.0708020050. The cubic root of 12517945 is about 232.1904463270.

The spelling of 12517945 in words is "twelve million, five hundred seventeen thousand, nine hundred forty-five".