1044002021 has 2 divisors, whose sum is σ = 1044002022. Its totient is φ = 1044002020.

The previous prime is 1044002017. The next prime is 1044002033. The reversal of 1044002021 is 1202004401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1034329921 + 9672100 = 32161^2 + 3110^2 .

It is a cyclic number.

It is not a de Polignac number, because 1044002021 - 2² = 1044002017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1044001987 and 1044002005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1044002051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 522001010 + 522001011.

It is an arithmetic number, because the mean of its divisors is an integer number (522001011).

Almost surely, 2^1044002021 is an apocalyptic number.

It is an amenable number.

1044002021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1044002021 is an equidigital number, since it uses as much as digits as its factorization.

1044002021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 1044002021 is about 32311.0201169818. The cubic root of 1044002021 is about 1014.4573189996.

Adding to 1044002021 its reverse (1202004401), we get a palindrome (2246006422).

The spelling of 1044002021 in words is "one billion, forty-four million, two thousand, twenty-one".