12704661 has 32 divisors (see below), whose sum is σ = 20217600. Its totient is φ = 7856640.

The previous prime is 12704641. The next prime is 12704663. The reversal of 12704661 is 16640721.

12704661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12704661 - 2¹⁰ = 12703637 is a prime.

It is a super-2 number, since 2×12704661² = 322816822249842, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12704663) 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 31 ways as a sum of consecutive naturals, for example, 40696 + ... + 41006.

It is an arithmetic number, because the mean of its divisors is an integer number (631800).

Almost surely, 2^12704661 is an apocalyptic number.

It is an amenable number.

12704661 is a deficient number, since it is larger than the sum of its proper divisors (7512939).

12704661 is a wasteful number, since it uses less digits than its factorization.

12704661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426 (or 420 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 12704661 is about 3564.3598303202. The cubic root of 12704661 is about 233.3391941839.

The spelling of 12704661 in words is "twelve million, seven hundred four thousand, six hundred sixty-one".