3635521 has 8 divisors (see below), whose sum is σ = 3785760. Its totient is φ = 3488352.

The previous prime is 3635459. The next prime is 3635551. The reversal of 3635521 is 1255363.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3635521 - 2⁷ = 3635393 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3635551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1821 + ... + 3253.

It is an arithmetic number, because the mean of its divisors is an integer number (473220).

Almost surely, 2^3635521 is an apocalyptic number.

It is an amenable number.

3635521 is a deficient number, since it is larger than the sum of its proper divisors (150239).

3635521 is a wasteful number, since it uses less digits than its factorization.

3635521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1535.

The product of its digits is 2700, while the sum is 25.

The square root of 3635521 is about 1906.7042245718. The cubic root of 3635521 is about 153.7643131188.

The spelling of 3635521 in words is "three million, six hundred thirty-five thousand, five hundred twenty-one".