1304311 has 4 divisors (see below), whose sum is σ = 1306792. Its totient is φ = 1301832.

The previous prime is 1304309. The next prime is 1304321. The reversal of 1304311 is 1134031.

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

It is a cyclic number.

It is not a de Polignac number, because 1304311 - 2¹ = 1304309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1304291 and 1304300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304321) 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, 105 + ... + 1618.

It is an arithmetic number, because the mean of its divisors is an integer number (326698).

2^1304311 is an apocalyptic number.

1304311 is a deficient number, since it is larger than the sum of its proper divisors (2481).

1304311 is an equidigital number, since it uses as much as digits as its factorization.

1304311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2480.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1304311 is about 1142.0643589571. The cubic root of 1304311 is about 109.2597960869.

Adding to 1304311 its reverse (1134031), we get a palindrome (2438342).

The spelling of 1304311 in words is "one million, three hundred four thousand, three hundred eleven".