12638065 has 16 divisors (see below), whose sum is σ = 16899840. Its totient is φ = 8993920.

The previous prime is 12638057. The next prime is 12638077. The reversal of 12638065 is 56083621.

12638065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12638065 - 2³ = 12638057 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141 + ... + 5029.

It is an arithmetic number, because the mean of its divisors is an integer number (1056240).

Almost surely, 2^12638065 is an apocalyptic number.

It is an amenable number.

12638065 is a deficient number, since it is larger than the sum of its proper divisors (4261775).

12638065 is a wasteful number, since it uses less digits than its factorization.

12638065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4952.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 12638065 is about 3555.0056258746. The cubic root of 12638065 is about 232.9307695858.

The spelling of 12638065 in words is "twelve million, six hundred thirty-eight thousand, sixty-five".