7204321 has 4 divisors (see below), whose sum is σ = 7227652. Its totient is φ = 7180992.

The previous prime is 7204289. The next prime is 7204333. The reversal of 7204321 is 1234027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1234027 = 499 ⋅2473.

It can be written as a sum of positive squares in 2 ways, for example, as 1347921 + 5856400 = 1161^2 + 2420^2 .

It is a cyclic number.

It is not a de Polignac number, because 7204321 - 2⁵ = 7204289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7204391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11196 + ... + 11821.

It is an arithmetic number, because the mean of its divisors is an integer number (1806913).

Almost surely, 2^7204321 is an apocalyptic number.

It is an amenable number.

7204321 is a deficient number, since it is larger than the sum of its proper divisors (23331).

7204321 is a wasteful number, since it uses less digits than its factorization.

7204321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23330.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 7204321 is about 2684.0866230433. The cubic root of 7204321 is about 193.1364977113.

Adding to 7204321 its reverse (1234027), we get a palindrome (8438348).

It can be divided in two parts, 720 and 4321, that added together give a square (5041 = 71²).

The spelling of 7204321 in words is "seven million, two hundred four thousand, three hundred twenty-one".