2444021 has 2 divisors, whose sum is σ = 2444022. Its totient is φ = 2444020.

The previous prime is 2444017. The next prime is 2444063. The reversal of 2444021 is 1204442.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1473796 + 970225 = 1214^2 + 985^2 .

It is a cyclic number.

It is not a de Polignac number, because 2444021 - 2² = 2444017 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2444081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1222010 + 1222011.

It is an arithmetic number, because the mean of its divisors is an integer number (1222011).

2^2444021 is an apocalyptic number.

It is an amenable number.

2444021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2444021 is an equidigital number, since it uses as much as digits as its factorization.

2444021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 2444021 is about 1563.3364960878. The cubic root of 2444021 is about 134.7002218717.

Adding to 2444021 its reverse (1204442), we get a palindrome (3648463).

The spelling of 2444021 in words is "two million, four hundred forty-four thousand, twenty-one".