1304335421 has 16 divisors (see below), whose sum is σ = 1394593200. Its totient is φ = 1215636480.

The previous prime is 1304335411. The next prime is 1304335441. The reversal of 1304335421 is 1245334031.

It can be written as a sum of positive squares in 8 ways, for example, as 245548900 + 1058786521 = 15670^2 + 32539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1304335421 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 (1304335411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1167155 + ... + 1168271.

It is an arithmetic number, because the mean of its divisors is an integer number (87162075).

Almost surely, 2^1304335421 is an apocalyptic number.

It is an amenable number.

1304335421 is a deficient number, since it is larger than the sum of its proper divisors (90257779).

1304335421 is a wasteful number, since it uses less digits than its factorization.

1304335421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 1304335421 is about 36115.5841846702. The cubic root of 1304335421 is about 1092.6047798378.

Adding to 1304335421 its reverse (1245334031), we get a palindrome (2549669452).

The spelling of 1304335421 in words is "one billion, three hundred four million, three hundred thirty-five thousand, four hundred twenty-one".