12557507 has 8 divisors (see below), whose sum is σ = 12876096. Its totient is φ = 12241152.

The previous prime is 12557491. The next prime is 12557549. The reversal of 12557507 is 70575521.

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 12557507 - 2⁴ = 12557491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12557107) 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, 18323 + ... + 18995.

It is an arithmetic number, because the mean of its divisors is an integer number (1609512).

Almost surely, 2^12557507 is an apocalyptic number.

12557507 is a deficient number, since it is larger than the sum of its proper divisors (318589).

12557507 is an equidigital number, since it uses as much as digits as its factorization.

12557507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117.

The product of its (nonzero) digits is 12250, while the sum is 32.

The square root of 12557507 is about 3543.6572915563. The cubic root of 12557507 is about 232.4347957593.

The spelling of 12557507 in words is "twelve million, five hundred fifty-seven thousand, five hundred seven".