12638375 has 8 divisors (see below), whose sum is σ = 15772848. Its totient is φ = 10110600.

The previous prime is 12638369. The next prime is 12638377. The reversal of 12638375 is 57383621.

It is a de Polignac number, because none of the positive numbers 2^k-12638375 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 (12638377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50429 + ... + 50678.

It is an arithmetic number, because the mean of its divisors is an integer number (1971606).

Almost surely, 2^12638375 is an apocalyptic number.

12638375 is a deficient number, since it is larger than the sum of its proper divisors (3134473).

12638375 is an equidigital number, since it uses as much as digits as its factorization.

12638375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101122 (or 101112 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 12638375 is about 3555.0492261008. The cubic root of 12638375 is about 232.9326740954.

The spelling of 12638375 in words is "twelve million, six hundred thirty-eight thousand, three hundred seventy-five".