1321304304 has 20 divisors (see below), whose sum is σ = 3413369576. Its totient is φ = 440434752.

The previous prime is 1321304273. The next prime is 1321304329. The reversal of 1321304304 is 4034031231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13763539 + ... + 13763634.

Almost surely, 2^1321304304 is an apocalyptic number.

It is an amenable number.

1321304304 is an abundant number, since it is smaller than the sum of its proper divisors (2092065272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321304304 is a wasteful number, since it uses less digits than its factorization.

1321304304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27527184 (or 27527178 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 1321304304 is about 36349.7497102800. The cubic root of 1321304304 is about 1097.3224973630.

Adding to 1321304304 its reverse (4034031231), we get a palindrome (5355335535).

The spelling of 1321304304 in words is "one billion, three hundred twenty-one million, three hundred four thousand, three hundred four".