12505617 has 32 divisors (see below), whose sum is σ = 19496960. Its totient is φ = 7912080.

The previous prime is 12505613. The next prime is 12505627. The reversal of 12505617 is 71650521.

12505617 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12505617 - 2² = 12505613 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12505613) 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, 55968 + ... + 56190.

It is an arithmetic number, because the mean of its divisors is an integer number (609280).

Almost surely, 2^12505617 is an apocalyptic number.

It is an amenable number.

12505617 is a deficient number, since it is larger than the sum of its proper divisors (6991343).

12505617 is a wasteful number, since it uses less digits than its factorization.

12505617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330 (or 324 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 12505617 is about 3536.3281804719. The cubic root of 12505617 is about 232.1141988810.

The spelling of 12505617 in words is "twelve million, five hundred five thousand, six hundred seventeen".