3546721 has 2 divisors, whose sum is σ = 3546722. Its totient is φ = 3546720.

The previous prime is 3546713. The next prime is 3546737. The reversal of 3546721 is 1276453.

3546721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3534400 + 12321 = 1880^2 + 111^2 .

It is a cyclic number.

It is not a de Polignac number, because 3546721 - 2³ = 3546713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3546721.

It is not a weakly prime, because it can be changed into another prime (3540721) 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, 1773360 + 1773361.

It is an arithmetic number, because the mean of its divisors is an integer number (1773361).

Almost surely, 2^3546721 is an apocalyptic number.

It is an amenable number.

3546721 is a deficient number, since it is larger than the sum of its proper divisors (1).

3546721 is an equidigital number, since it uses as much as digits as its factorization.

3546721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 28.

The square root of 3546721 is about 1883.2740108651. The cubic root of 3546721 is about 152.5020478091.

The spelling of 3546721 in words is "three million, five hundred forty-six thousand, seven hundred twenty-one".