7165321 has 2 divisors, whose sum is σ = 7165322. Its totient is φ = 7165320.

The previous prime is 7165289. The next prime is 7165339. The reversal of 7165321 is 1235617.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6702921 + 462400 = 2589^2 + 680^2 .

It is a cyclic number.

It is not a de Polignac number, because 7165321 - 2⁵ = 7165289 is a prime.

It is not a weakly prime, because it can be changed into another prime (7165021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3582660 + 3582661.

It is an arithmetic number, because the mean of its divisors is an integer number (3582661).

Almost surely, 2^7165321 is an apocalyptic number.

It is an amenable number.

7165321 is a deficient number, since it is larger than the sum of its proper divisors (1).

7165321 is an equidigital number, since it uses as much as digits as its factorization.

7165321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 25.

The square root of 7165321 is about 2676.8117229271. The cubic root of 7165321 is about 192.7873574149.

The spelling of 7165321 in words is "seven million, one hundred sixty-five thousand, three hundred twenty-one".