7328521 has 2 divisors, whose sum is σ = 7328522. Its totient is φ = 7328520.

The previous prime is 7328501. The next prime is 7328539. The reversal of 7328521 is 1258237.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6350400 + 978121 = 2520^2 + 989^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7328521 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7328521.

It is not a weakly prime, because it can be changed into another prime (7328501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3664260 + 3664261.

It is an arithmetic number, because the mean of its divisors is an integer number (3664261).

Almost surely, 2^7328521 is an apocalyptic number.

It is an amenable number.

7328521 is a deficient number, since it is larger than the sum of its proper divisors (1).

7328521 is an equidigital number, since it uses as much as digits as its factorization.

7328521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3360, while the sum is 28.

The square root of 7328521 is about 2707.1241197995. The cubic root of 7328521 is about 194.2400489716.

The spelling of 7328521 in words is "seven million, three hundred twenty-eight thousand, five hundred twenty-one".