12638111 has 6 divisors (see below), whose sum is σ = 13059936. Its totient is φ = 12229500.

The previous prime is 12638099. The next prime is 12638147. The reversal of 12638111 is 11183621.

It is not a de Polignac number, because 12638111 - 2⁶ = 12638047 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 (12631111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5615 + ... + 7536.

It is an arithmetic number, because the mean of its divisors is an integer number (2176656).

Almost surely, 2^12638111 is an apocalyptic number.

12638111 is a deficient number, since it is larger than the sum of its proper divisors (421825).

12638111 is an equidigital number, since it uses as much as digits as its factorization.

12638111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13213 (or 13182 counting only the distinct ones).

The product of its digits is 288, while the sum is 23.

The square root of 12638111 is about 3555.0120956194. The cubic root of 12638111 is about 232.9310521924.

The spelling of 12638111 in words is "twelve million, six hundred thirty-eight thousand, one hundred eleven".