2915321 has 2 divisors, whose sum is σ = 2915322. Its totient is φ = 2915320.

The previous prime is 2915317. The next prime is 2915323. The reversal of 2915321 is 1235192.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2446096 + 469225 = 1564^2 + 685^2 .

It is a cyclic number.

It is not a de Polignac number, because 2915321 - 2² = 2915317 is a prime.

Together with 2915323, 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 (2915323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1457660 + 1457661.

It is an arithmetic number, because the mean of its divisors is an integer number (1457661).

2^2915321 is an apocalyptic number.

It is an amenable number.

2915321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2915321 is an equidigital number, since it uses as much as digits as its factorization.

2915321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 23.

The square root of 2915321 is about 1707.4311113483. The cubic root of 2915321 is about 142.8550048728.

The spelling of 2915321 in words is "two million, nine hundred fifteen thousand, three hundred twenty-one".