3161321 has 2 divisors, whose sum is σ = 3161322. Its totient is φ = 3161320.

The previous prime is 3161309. The next prime is 3161329. The reversal of 3161321 is 1231613.

3161321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2088025 + 1073296 = 1445^2 + 1036^2 .

It is an emirp because it is prime and its reverse (1231613) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3161321 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3161321.

It is not a weakly prime, because it can be changed into another prime (3161329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1580660 + 1580661.

It is an arithmetic number, because the mean of its divisors is an integer number (1580661).

Almost surely, 2^3161321 is an apocalyptic number.

It is an amenable number.

3161321 is a deficient number, since it is larger than the sum of its proper divisors (1).

3161321 is an equidigital number, since it uses as much as digits as its factorization.

3161321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 17.

The square root of 3161321 is about 1778.0104049189. The cubic root of 3161321 is about 146.7651238589.

Adding to 3161321 its reverse (1231613), we get a palindrome (4392934).

The spelling of 3161321 in words is "three million, one hundred sixty-one thousand, three hundred twenty-one".