12688250 has 16 divisors (see below), whose sum is σ = 23752872. Its totient is φ = 5075200.

The previous prime is 12688243. The next prime is 12688297. The reversal of 12688250 is 5288621.

It can be written as a sum of positive squares in 4 ways, for example, as 6817321 + 5870929 = 2611^2 + 2423^2 .

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 7 ways as a sum of consecutive naturals, for example, 25127 + ... + 25626.

Almost surely, 2^12688250 is an apocalyptic number.

12688250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12688250 is a deficient number, since it is larger than the sum of its proper divisors (11064622).

12688250 is an equidigital number, since it uses as much as digits as its factorization.

12688250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50770 (or 50760 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 12688250 is about 3562.0569899989. The cubic root of 12688250 is about 233.2386804296.

The spelling of 12688250 in words is "twelve million, six hundred eighty-eight thousand, two hundred fifty".