12705507 has 12 divisors (see below), whose sum is σ = 18654064. Its totient is φ = 8331120.

The previous prime is 12705503. The next prime is 12705523. The reversal of 12705507 is 70550721.

12705507 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12705507 - 2² = 12705503 is a prime.

It is a super-2 number, since 2×12705507² = 322859816254098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12705503) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11023 + ... + 12120.

Almost surely, 2^12705507 is an apocalyptic number.

12705507 is a deficient number, since it is larger than the sum of its proper divisors (5948557).

12705507 is a wasteful number, since it uses less digits than its factorization.

12705507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23210 (or 23207 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 27.

The square root of 12705507 is about 3564.4785032316. The cubic root of 12705507 is about 233.3443734005.

The spelling of 12705507 in words is "twelve million, seven hundred five thousand, five hundred seven".