1004422021 has 2 divisors, whose sum is σ = 1004422022. Its totient is φ = 1004422020.

The previous prime is 1004421973. The next prime is 1004422043. The reversal of 1004422021 is 1202244001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 877048225 + 127373796 = 29615^2 + 11286^2 .

It is a cyclic number.

It is not a de Polignac number, because 1004422021 - 2⁷ = 1004421893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1004421986 and 1004422004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1004422921) 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, 502211010 + 502211011.

It is an arithmetic number, because the mean of its divisors is an integer number (502211011).

Almost surely, 2^1004422021 is an apocalyptic number.

It is an amenable number.

1004422021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1004422021 is an equidigital number, since it uses as much as digits as its factorization.

1004422021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1004422021 is about 31692.6177681807. The cubic root of 1004422021 is about 1001.4718396253.

Adding to 1004422021 its reverse (1202244001), we get a palindrome (2206666022).

The spelling of 1004422021 in words is "one billion, four million, four hundred twenty-two thousand, twenty-one".