7242321 has 4 divisors (see below), whose sum is σ = 9656432. Its totient is φ = 4828212.

The previous prime is 7242307. The next prime is 7242329. The reversal of 7242321 is 1232427.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-7242321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7242329) 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, 1207051 + ... + 1207056.

It is an arithmetic number, because the mean of its divisors is an integer number (2414108).

Almost surely, 2^7242321 is an apocalyptic number.

It is an amenable number.

7242321 is a deficient number, since it is larger than the sum of its proper divisors (2414111).

7242321 is a wasteful number, since it uses less digits than its factorization.

7242321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2414110.

The product of its digits is 672, while the sum is 21.

The square root of 7242321 is about 2691.1560712824. The cubic root of 7242321 is about 193.4754757961.

Adding to 7242321 its reverse (1232427), we get a palindrome (8474748).

The spelling of 7242321 in words is "seven million, two hundred forty-two thousand, three hundred twenty-one".