12704161 has 2 divisors, whose sum is σ = 12704162. Its totient is φ = 12704160.

The previous prime is 12704129. The next prime is 12704171. The reversal of 12704161 is 16140721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12496225 + 207936 = 3535^2 + 456^2 .

It is an emirp because it is prime and its reverse (16140721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12704161 - 2⁵ = 12704129 is a prime.

It is a super-2 number, since 2×12704161² = 322791413427842, which contains 22 as substring.

It is a Chen prime.

It is equal to p₈₃₁₁₇₂ and since 12704161 and 831172 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (12704171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6352080 + 6352081.

It is an arithmetic number, because the mean of its divisors is an integer number (6352081).

Almost surely, 2^12704161 is an apocalyptic number.

It is an amenable number.

12704161 is a deficient number, since it is larger than the sum of its proper divisors (1).

12704161 is an equidigital number, since it uses as much as digits as its factorization.

12704161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 12704161 is about 3564.2896908080. The cubic root of 12704161 is about 233.3361330730.

Adding to 12704161 its reverse (16140721), we get a palindrome (28844882).

The spelling of 12704161 in words is "twelve million, seven hundred four thousand, one hundred sixty-one".