1304424424021 has 4 divisors (see below), whose sum is σ = 1304430600844. Its totient is φ = 1304418247200.

The previous prime is 1304424424013. The next prime is 1304424424027. The reversal of 1304424424021 is 1204244244031.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42183408996 + 1262241015025 = 205386^2 + 1123495^2 .

It is a cyclic number.

It is not a de Polignac number, because 1304424424021 - 2³ = 1304424424013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304424424027) 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, 2760000 + ... + 3197881.

It is an arithmetic number, because the mean of its divisors is an integer number (326107650211).

Almost surely, 2^{1304424424021} is an apocalyptic number.

It is an amenable number.

1304424424021 is a deficient number, since it is larger than the sum of its proper divisors (6176823).

1304424424021 is an equidigital number, since it uses as much as digits as its factorization.

1304424424021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6176822.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 1304424424021 its reverse (1204244244031), we get a palindrome (2508668668052).

The spelling of 1304424424021 in words is "one trillion, three hundred four billion, four hundred twenty-four million, four hundred twenty-four thousand, twenty-one".