12688426 has 16 divisors (see below), whose sum is σ = 20289096. Its totient is φ = 5930496.

The previous prime is 12688411. The next prime is 12688441. The reversal of 12688426 is 62488621.

It is an interprime number because it is at equal distance from previous prime (12688411) and next prime (12688441).

It can be written as a sum of positive squares in 4 ways, for example, as 10725625 + 1962801 = 3275^2 + 1401^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4150 + ... + 6526.

Almost surely, 2^12688426 is an apocalyptic number.

12688426 is a deficient number, since it is larger than the sum of its proper divisors (7600670).

12688426 is a wasteful number, since it uses less digits than its factorization.

12688426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2553.

The product of its digits is 36864, while the sum is 37.

The square root of 12688426 is about 3562.0816947397. The cubic root of 12688426 is about 233.2397588504.

The spelling of 12688426 in words is "twelve million, six hundred eighty-eight thousand, four hundred twenty-six".