1304312161 has 2 divisors, whose sum is σ = 1304312162. Its totient is φ = 1304312160.

The previous prime is 1304312159. The next prime is 1304312167. The reversal of 1304312161 is 1612134031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1290174561 + 14137600 = 35919^2 + 3760^2 .

It is a cyclic number.

It is not a de Polignac number, because 1304312161 - 2¹ = 1304312159 is a prime.

Together with 1304312159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1304312167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652156080 + 652156081.

It is an arithmetic number, because the mean of its divisors is an integer number (652156081).

Almost surely, 2^1304312161 is an apocalyptic number.

It is an amenable number.

1304312161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1304312161 is an equidigital number, since it uses as much as digits as its factorization.

1304312161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1304312161 is about 36115.2621615848. The cubic root of 1304312161 is about 1092.5982850518.

Adding to 1304312161 its reverse (1612134031), we get a palindrome (2916446192).

The spelling of 1304312161 in words is "one billion, three hundred four million, three hundred twelve thousand, one hundred sixty-one".