12688634 has 8 divisors (see below), whose sum is σ = 21751968. Its totient is φ = 5437980.

The previous prime is 12688609. The next prime is 12688649. The reversal of 12688634 is 43688621.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12688634² = 322002865571912, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 453152 + ... + 453179.

It is an arithmetic number, because the mean of its divisors is an integer number (2718996).

Almost surely, 2^12688634 is an apocalyptic number.

12688634 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12688634 is a deficient number, since it is larger than the sum of its proper divisors (9063334).

12688634 is an equidigital number, since it uses as much as digits as its factorization.

12688634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906340.

The product of its digits is 55296, while the sum is 38.

The square root of 12688634 is about 3562.1108910308. The cubic root of 12688634 is about 233.2410333348.

The spelling of 12688634 in words is "twelve million, six hundred eighty-eight thousand, six hundred thirty-four".