2971321 has 2 divisors, whose sum is σ = 2971322. Its totient is φ = 2971320.

The previous prime is 2971307. The next prime is 2971333. The reversal of 2971321 is 1231792.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2624400 + 346921 = 1620^2 + 589^2 .

It is a cyclic number.

It is not a de Polignac number, because 2971321 - 2⁷ = 2971193 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (2971121) 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, 1485660 + 1485661.

It is an arithmetic number, because the mean of its divisors is an integer number (1485661).

2^2971321 is an apocalyptic number.

It is an amenable number.

2971321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2971321 is an equidigital number, since it uses as much as digits as its factorization.

2971321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 25.

The square root of 2971321 is about 1723.7520123266. The cubic root of 2971321 is about 143.7639038851.

The spelling of 2971321 in words is "two million, nine hundred seventy-one thousand, three hundred twenty-one".