3322721 has 2 divisors, whose sum is σ = 3322722. Its totient is φ = 3322720.

The previous prime is 3322699. The next prime is 3322723. The reversal of 3322721 is 1272233.

3322721 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., 2739025 + 583696 = 1655^2 + 764^2 .

It is an emirp because it is prime and its reverse (1272233) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3322721 is a prime.

It is a super-2 number, since 2×3322721² = 22080949687682, which contains 22 as substring.

Together with 3322723, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 3322693 and 3322702.

It is not a weakly prime, because it can be changed into another prime (3322723) 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, 1661360 + 1661361.

It is an arithmetic number, because the mean of its divisors is an integer number (1661361).

Almost surely, 2^3322721 is an apocalyptic number.

It is an amenable number.

3322721 is a deficient number, since it is larger than the sum of its proper divisors (1).

3322721 is an equidigital number, since it uses as much as digits as its factorization.

3322721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 20.

The square root of 3322721 is about 1822.8332342812. The cubic root of 3322721 is about 149.2214624828.

Adding to 3322721 its reverse (1272233), we get a palindrome (4594954).

The spelling of 3322721 in words is "three million, three hundred twenty-two thousand, seven hundred twenty-one".