3605421 has 16 divisors (see below), whose sum is σ = 5181440. Its totient is φ = 2222640.

The previous prime is 3605419. The next prime is 3605443. The reversal of 3605421 is 1245063.

It is a happy number.

It is not a de Polignac number, because 3605421 - 2¹ = 3605419 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 (3605221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1716 + ... + 3186.

It is an arithmetic number, because the mean of its divisors is an integer number (323840).

Almost surely, 2^3605421 is an apocalyptic number.

It is an amenable number.

3605421 is a deficient number, since it is larger than the sum of its proper divisors (1576019).

3605421 is a wasteful number, since it uses less digits than its factorization.

3605421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 3605421 is about 1898.7946176456. The cubic root of 3605421 is about 153.3387768494.

The spelling of 3605421 in words is "three million, six hundred five thousand, four hundred twenty-one".