3310721 has 2 divisors, whose sum is σ = 3310722. Its totient is φ = 3310720.

The previous prime is 3310717. The next prime is 3310739. The reversal of 3310721 is 1270133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3013696 + 297025 = 1736^2 + 545^2 .

It is a cyclic number.

It is not a de Polignac number, because 3310721 - 2² = 3310717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3310721.

It is not a weakly prime, because it can be changed into another prime (3310771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1655360 + 1655361.

It is an arithmetic number, because the mean of its divisors is an integer number (1655361).

Almost surely, 2^3310721 is an apocalyptic number.

It is an amenable number.

3310721 is a deficient number, since it is larger than the sum of its proper divisors (1).

3310721 is an equidigital number, since it uses as much as digits as its factorization.

3310721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126, while the sum is 17.

The square root of 3310721 is about 1819.5386777972. The cubic root of 3310721 is about 149.0416081267.

Adding to 3310721 its reverse (1270133), we get a palindrome (4580854).

The spelling of 3310721 in words is "three million, three hundred ten thousand, seven hundred twenty-one".