1304011021 has 4 divisors (see below), whose sum is σ = 1372643200. Its totient is φ = 1235378844.

The previous prime is 1304010989. The next prime is 1304011039. The reversal of 1304011021 is 1201104031.

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 1304011021 - 2⁵ = 1304010989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1304010992 and 1304011010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304011321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34316061 + ... + 34316098.

It is an arithmetic number, because the mean of its divisors is an integer number (343160800).

Almost surely, 2^1304011021 is an apocalyptic number.

It is an amenable number.

1304011021 is a deficient number, since it is larger than the sum of its proper divisors (68632179).

1304011021 is an equidigital number, since it uses as much as digits as its factorization.

1304011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68632178.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1304011021 is about 36111.0927693971. The cubic root of 1304011021 is about 1092.5141921016.

Adding to 1304011021 its reverse (1201104031), we get a palindrome (2505115052).

The spelling of 1304011021 in words is "one billion, three hundred four million, eleven thousand, twenty-one".