1044004421 has 2 divisors, whose sum is σ = 1044004422. Its totient is φ = 1044004420.

The previous prime is 1044004387. The next prime is 1044004427. The reversal of 1044004421 is 1244004401.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1031116321 + 12888100 = 32111^2 + 3590^2 .

It is an emirp because it is prime and its reverse (1244004401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1044004421 - 2¹⁰ = 1044003397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1044004393 and 1044004402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1044004427) 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, 522002210 + 522002211.

It is an arithmetic number, because the mean of its divisors is an integer number (522002211).

Almost surely, 2^1044004421 is an apocalyptic number.

It is an amenable number.

1044004421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1044004421 is an equidigital number, since it uses as much as digits as its factorization.

1044004421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1044004421 is about 32311.0572559921. The cubic root of 1044004421 is about 1014.4580963595.

Subtracting from 1044004421 its sum of digits (20), we obtain a palindrome (1044004401).

Adding to 1044004421 its reverse (1244004401), we get a palindrome (2288008822).

The spelling of 1044004421 in words is "one billion, forty-four million, four thousand, four hundred twenty-one".