12638011 has 4 divisors (see below), whose sum is σ = 12659112. Its totient is φ = 12616912.

The previous prime is 12637993. The next prime is 12638023. The reversal of 12638011 is 11083621.

12638011 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12638011 - 2⁷ = 12637883 is a prime.

It is a super-2 number, since 2×12638011² = 319438644072242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12630011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9625 + ... + 10858.

It is an arithmetic number, because the mean of its divisors is an integer number (3164778).

Almost surely, 2^12638011 is an apocalyptic number.

12638011 is a deficient number, since it is larger than the sum of its proper divisors (21101).

12638011 is an equidigital number, since it uses as much as digits as its factorization.

12638011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21100.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 12638011 is about 3554.9980309418. The cubic root of 12638011 is about 232.9304378293.

The spelling of 12638011 in words is "twelve million, six hundred thirty-eight thousand, eleven".