3603645 has 24 divisors (see below), whose sum is σ = 6337656. Its totient is φ = 1893888.

The previous prime is 3603623. The next prime is 3603659. The reversal of 3603645 is 5463063.

It can be written as a sum of positive squares in 4 ways, for example, as 210681 + 3392964 = 459^2 + 1842^2 .

It is not a de Polignac number, because 3603645 - 2⁸ = 3603389 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2737 + ... + 3833.

It is an arithmetic number, because the mean of its divisors is an integer number (264069).

Almost surely, 2^3603645 is an apocalyptic number.

It is an amenable number.

3603645 is a deficient number, since it is larger than the sum of its proper divisors (2734011).

3603645 is a wasteful number, since it uses less digits than its factorization.

3603645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181 (or 1178 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 3603645 is about 1898.3268949262. The cubic root of 3603645 is about 153.3135949177.

It can be divided in two parts, 360 and 3645, that added together give a triangular number (4005 = T₈₉).

The spelling of 3603645 in words is "three million, six hundred three thousand, six hundred forty-five".