3040021 has 2 divisors, whose sum is σ = 3040022. Its totient is φ = 3040020.

The previous prime is 3040003. The next prime is 3040043. The reversal of 3040021 is 1200403.

3040021 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., 2283121 + 756900 = 1511^2 + 870^2 .

It is an emirp because it is prime and its reverse (1200403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3040021 - 2⁵ = 3039989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3040061) 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, 1520010 + 1520011.

It is an arithmetic number, because the mean of its divisors is an integer number (1520011).

Almost surely, 2^3040021 is an apocalyptic number.

It is an amenable number.

3040021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3040021 is an equidigital number, since it uses as much as digits as its factorization.

3040021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 3040021 is about 1743.5655995689. The cubic root of 3040021 is about 144.8634624345.

Adding to 3040021 its reverse (1200403), we get a palindrome (4240424).

The spelling of 3040021 in words is "three million, forty thousand, twenty-one".