3605865 has 16 divisors (see below), whose sum is σ = 5793216. Its totient is φ = 1915200.

The previous prime is 3605857. The next prime is 3605867. The reversal of 3605865 is 5685063.

3605865 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 3605865 - 2³ = 3605857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3605867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6030 + ... + 6600.

It is an arithmetic number, because the mean of its divisors is an integer number (362076).

Almost surely, 2^3605865 is an apocalyptic number.

It is an amenable number.

3605865 is a deficient number, since it is larger than the sum of its proper divisors (2187351).

3605865 is a wasteful number, since it uses less digits than its factorization.

3605865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 3605865 is about 1898.9115303247. The cubic root of 3605865 is about 153.3450710401.

The spelling of 3605865 in words is "three million, six hundred five thousand, eight hundred sixty-five".