3645603 has 12 divisors (see below), whose sum is σ = 5671120. Its totient is φ = 2243376.

The previous prime is 3645589. The next prime is 3645611. The reversal of 3645603 is 3065463.

3645603 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 3645603 - 2⁵ = 3645571 is a prime.

3645603 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3645623) 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 11 ways as a sum of consecutive naturals, for example, 15463 + ... + 15696.

Almost surely, 2^3645603 is an apocalyptic number.

3645603 is a deficient number, since it is larger than the sum of its proper divisors (2025517).

3645603 is a wasteful number, since it uses less digits than its factorization.

3645603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31178 (or 31175 counting only the distinct ones).

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

The square root of 3645603 is about 1909.3462231874. The cubic root of 3645603 is about 153.9063212803.

The spelling of 3645603 in words is "three million, six hundred forty-five thousand, six hundred three".