1004104021 has 2 divisors, whose sum is σ = 1004104022. Its totient is φ = 1004104020.

The previous prime is 1004104007. The next prime is 1004104069. The reversal of 1004104021 is 1204014001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 981882225 + 22221796 = 31335^2 + 4714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1004104021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1004103992 and 1004104010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1004105021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502052010 + 502052011.

It is an arithmetic number, because the mean of its divisors is an integer number (502052011).

Almost surely, 2^1004104021 is an apocalyptic number.

It is an amenable number.

1004104021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1004104021 is an equidigital number, since it uses as much as digits as its factorization.

1004104021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1004104021 is about 31687.6004298211. The cubic root of 1004104021 is about 1001.3661398121.

Adding to 1004104021 its reverse (1204014001), we get a palindrome (2208118022).

The spelling of 1004104021 in words is "one billion, four million, one hundred four thousand, twenty-one".