1004420321 has 4 divisors (see below), whose sum is σ = 1008924672. Its totient is φ = 999915972.

The previous prime is 1004420311. The next prime is 1004420323. The reversal of 1004420321 is 1230244001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1004420321 - 2⁶ = 1004420257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1004420321.

It is not an unprimeable number, because it can be changed into a prime (1004420323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2251841 + ... + 2252286.

It is an arithmetic number, because the mean of its divisors is an integer number (252231168).

Almost surely, 2^1004420321 is an apocalyptic number.

It is an amenable number.

1004420321 is a deficient number, since it is larger than the sum of its proper divisors (4504351).

1004420321 is an equidigital number, since it uses as much as digits as its factorization.

1004420321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4504350.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1004420321 is about 31692.5909480434. The cubic root of 1004420321 is about 1001.4712746227.

Adding to 1004420321 its reverse (1230244001), we get a palindrome (2234664322).

The spelling of 1004420321 in words is "one billion, four million, four hundred twenty thousand, three hundred twenty-one".