12704181 has 12 divisors (see below), whose sum is σ = 19704672. Its totient is φ = 7259448.

The previous prime is 12704177. The next prime is 12704189. The reversal of 12704181 is 18140721.

It is not a de Polignac number, because 12704181 - 2² = 12704177 is a prime.

It is a super-2 number, since 2×12704181² = 322792429761522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12704189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43065 + ... + 43358.

It is an arithmetic number, because the mean of its divisors is an integer number (1642056).

Almost surely, 2^12704181 is an apocalyptic number.

It is an amenable number.

12704181 is a deficient number, since it is larger than the sum of its proper divisors (7000491).

12704181 is an equidigital number, since it uses as much as digits as its factorization.

12704181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86440 (or 86433 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 12704181 is about 3564.2924964150. The cubic root of 12704181 is about 233.3362555190.

The spelling of 12704181 in words is "twelve million, seven hundred four thousand, one hundred eighty-one".