12505917 has 8 divisors (see below), whose sum is σ = 16692640. Its totient is φ = 8328240.

The previous prime is 12505903. The next prime is 12505939. The reversal of 12505917 is 71950521.

12505917 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12505917 - 2⁶ = 12505853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12505957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2259 + ... + 5487.

It is an arithmetic number, because the mean of its divisors is an integer number (2086580).

Almost surely, 2^12505917 is an apocalyptic number.

It is an amenable number.

12505917 is a deficient number, since it is larger than the sum of its proper divisors (4186723).

12505917 is a wasteful number, since it uses less digits than its factorization.

12505917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4523.

The product of its (nonzero) digits is 3150, while the sum is 30.

The square root of 12505917 is about 3536.3705970953. The cubic root of 12505917 is about 232.1160549457.

The spelling of 12505917 in words is "twelve million, five hundred five thousand, nine hundred seventeen".