7415321 has 2 divisors, whose sum is σ = 7415322. Its totient is φ = 7415320.

The previous prime is 7415257. The next prime is 7415323. The reversal of 7415321 is 1235147.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3748096 + 3667225 = 1936^2 + 1915^2 .

It is a cyclic number.

It is not a de Polignac number, because 7415321 - 2⁶ = 7415257 is a prime.

Together with 7415323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7415323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3707660 + 3707661.

It is an arithmetic number, because the mean of its divisors is an integer number (3707661).

Almost surely, 2^7415321 is an apocalyptic number.

It is an amenable number.

7415321 is a deficient number, since it is larger than the sum of its proper divisors (1).

7415321 is an equidigital number, since it uses as much as digits as its factorization.

7415321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 23.

The square root of 7415321 is about 2723.1087014660. The cubic root of 7415321 is about 195.0039096301.

The spelling of 7415321 in words is "seven million, four hundred fifteen thousand, three hundred twenty-one".