3300721 has 2 divisors, whose sum is σ = 3300722. Its totient is φ = 3300720.

The previous prime is 3300697. The next prime is 3300749. The reversal of 3300721 is 1270033.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1703025 + 1597696 = 1305^2 + 1264^2 .

It is an emirp because it is prime and its reverse (1270033) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3300721 - 2⁷ = 3300593 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3300695 and 3300704.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3300821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1650360 + 1650361.

It is an arithmetic number, because the mean of its divisors is an integer number (1650361).

Almost surely, 2^3300721 is an apocalyptic number.

It is an amenable number.

3300721 is a deficient number, since it is larger than the sum of its proper divisors (1).

3300721 is an equidigital number, since it uses as much as digits as its factorization.

3300721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 16.

The square root of 3300721 is about 1816.7886503388. The cubic root of 3300721 is about 148.8913972210.

Adding to 3300721 its reverse (1270033), we get a palindrome (4570754).

The spelling of 3300721 in words is "three million, three hundred thousand, seven hundred twenty-one".