7204521 has 8 divisors (see below), whose sum is σ = 9829600. Its totient is φ = 4691232.

The previous prime is 7204517. The next prime is 7204523. The reversal of 7204521 is 1254027.

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

It is not a de Polignac number, because 7204521 - 2² = 7204517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7204523) 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, 27796 + ... + 28053.

It is an arithmetic number, because the mean of its divisors is an integer number (1228700).

Almost surely, 2^7204521 is an apocalyptic number.

It is an amenable number.

7204521 is a deficient number, since it is larger than the sum of its proper divisors (2625079).

7204521 is a wasteful number, since it uses less digits than its factorization.

7204521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55895.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 7204521 is about 2684.1238794065. The cubic root of 7204521 is about 193.1382849231.

Adding to 7204521 its reverse (1254027), we get a palindrome (8458548).

The spelling of 7204521 in words is "seven million, two hundred four thousand, five hundred twenty-one".