7408321 has 2 divisors, whose sum is σ = 7408322. Its totient is φ = 7408320.

The previous prime is 7408307. The next prime is 7408333. The reversal of 7408321 is 1238047.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5880625 + 1527696 = 2425^2 + 1236^2 .

It is a cyclic number.

It is not a de Polignac number, because 7408321 - 2²¹ = 5311169 is a prime.

It is not a weakly prime, because it can be changed into another prime (7408301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3704160 + 3704161.

It is an arithmetic number, because the mean of its divisors is an integer number (3704161).

Almost surely, 2^7408321 is an apocalyptic number.

It is an amenable number.

7408321 is a deficient number, since it is larger than the sum of its proper divisors (1).

7408321 is an equidigital number, since it uses as much as digits as its factorization.

7408321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 7408321 is about 2721.8231022607. The cubic root of 7408321 is about 194.9425296342.

The spelling of 7408321 in words is "seven million, four hundred eight thousand, three hundred twenty-one".