13138645 has 16 divisors (see below), whose sum is σ = 17119872. Its totient is φ = 9622080.

The previous prime is 13138639. The next prime is 13138673. The reversal of 13138645 is 54683131.

It is not a de Polignac number, because 13138645 - 2⁹ = 13138133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7744 + ... + 9286.

It is an arithmetic number, because the mean of its divisors is an integer number (1069992).

Almost surely, 2^13138645 is an apocalyptic number.

It is an amenable number.

13138645 is a deficient number, since it is larger than the sum of its proper divisors (3981227).

13138645 is a wasteful number, since it uses less digits than its factorization.

13138645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1692.

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

The square root of 13138645 is about 3624.7268862633. The cubic root of 13138645 is about 235.9664141136.

The spelling of 13138645 in words is "thirteen million, one hundred thirty-eight thousand, six hundred forty-five".