1304412021 has 12 divisors (see below), whose sum is σ = 2055437280. Its totient is φ = 790552680.

The previous prime is 1304412013. The next prime is 1304412037. The reversal of 1304412021 is 1202144031.

It is not a de Polignac number, because 1304412021 - 2³ = 1304412013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1304411985 and 1304412003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304413021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6587841 + ... + 6588038.

It is an arithmetic number, because the mean of its divisors is an integer number (171286440).

Almost surely, 2^1304412021 is an apocalyptic number.

1304412021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1304412021 is a deficient number, since it is larger than the sum of its proper divisors (751025259).

1304412021 is a wasteful number, since it uses less digits than its factorization.

1304412021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13175896 (or 13175893 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1304412021 is about 36116.6446531236. The cubic root of 1304412021 is about 1092.6261679681.

Adding to 1304412021 its reverse (1202144031), we get a palindrome (2506556052).

The spelling of 1304412021 in words is "one billion, three hundred four million, four hundred twelve thousand, twenty-one".