13604605 has 12 divisors (see below), whose sum is σ = 18991260. Its totient is φ = 9328704.

The previous prime is 13604603. The next prime is 13604609. The reversal of 13604605 is 50640631.

13604605 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1695204 + 11909401 = 1302^2 + 3451^2 .

It is not a de Polignac number, because 13604605 - 2¹ = 13604603 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13604605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13604603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27520 + ... + 28009.

It is an arithmetic number, because the mean of its divisors is an integer number (1582605).

Almost surely, 2^13604605 is an apocalyptic number.

It is an amenable number.

13604605 is a deficient number, since it is larger than the sum of its proper divisors (5386655).

13604605 is an equidigital number, since it uses as much as digits as its factorization.

13604605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55548 (or 55541 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 13604605 is about 3688.4420830481. The cubic root of 13604605 is about 238.7235764732.

The spelling of 13604605 in words is "thirteen million, six hundred four thousand, six hundred five".