12507645 has 8 divisors (see below), whose sum is σ = 20012256. Its totient is φ = 6670736.

The previous prime is 12507619. The next prime is 12507667. The reversal of 12507645 is 54670521.

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

It is a cyclic number.

It is not a de Polignac number, because 12507645 - 2⁸ = 12507389 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 416907 + ... + 416936.

It is an arithmetic number, because the mean of its divisors is an integer number (2501532).

Almost surely, 2^12507645 is an apocalyptic number.

12507645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12507645 is a deficient number, since it is larger than the sum of its proper divisors (7504611).

12507645 is an equidigital number, since it uses as much as digits as its factorization.

12507645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833851.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 12507645 is about 3536.6149069414. The cubic root of 12507645 is about 232.1267453005.

The spelling of 12507645 in words is "twelve million, five hundred seven thousand, six hundred forty-five".