7221604 has 24 divisors (see below), whose sum is σ = 13741560. Its totient is φ = 3300864.

The previous prime is 7221589. The next prime is 7221611. The reversal of 7221604 is 4061227.

7221604 = 537² + 538² + ... + 560².

It can be written as a sum of positive squares in 4 ways, for example, as 304704 + 6916900 = 552^2 + 2630^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5262 + ... + 6490.

It is an arithmetic number, because the mean of its divisors is an integer number (572565).

Almost surely, 2^7221604 is an apocalyptic number.

It is an amenable number.

7221604 is a deficient number, since it is larger than the sum of its proper divisors (6519956).

7221604 is a wasteful number, since it uses less digits than its factorization.

7221604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1359 (or 1357 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 7221604 is about 2687.3042254274. The cubic root of 7221604 is about 193.2908177089.

The spelling of 7221604 in words is "seven million, two hundred twenty-one thousand, six hundred four".