4221604 has 12 divisors (see below), whose sum is σ = 7709184. Its totient is φ = 2018984.

The previous prime is 4221583. The next prime is 4221619. The reversal of 4221604 is 4061224.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22852 + ... + 23035.

It is an arithmetic number, because the mean of its divisors is an integer number (642432).

Almost surely, 2^4221604 is an apocalyptic number.

It is an amenable number.

4221604 is a deficient number, since it is larger than the sum of its proper divisors (3487580).

4221604 is a wasteful number, since it uses less digits than its factorization.

4221604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45914 (or 45912 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 4221604 is about 2054.6542288181. The cubic root of 4221604 is about 161.6190306151.

Adding to 4221604 its reverse (4061224), we get a palindrome (8282828).

The spelling of 4221604 in words is "four million, two hundred twenty-one thousand, six hundred four".