12688546 has 8 divisors (see below), whose sum is σ = 20496924. Its totient is φ = 5856240.

The previous prime is 12688531. The next prime is 12688547. The reversal of 12688546 is 64588621.

It can be written as a sum of positive squares in 2 ways, for example, as 12524521 + 164025 = 3539^2 + 405^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 12688499 and 12688508.

It is not an unprimeable number, because it can be changed into a prime (12688547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243985 + ... + 244036.

Almost surely, 2^12688546 is an apocalyptic number.

12688546 is a deficient number, since it is larger than the sum of its proper divisors (7808378).

12688546 is a wasteful number, since it uses less digits than its factorization.

12688546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488036.

The product of its digits is 92160, while the sum is 40.

The square root of 12688546 is about 3562.0985387830. The cubic root of 12688546 is about 233.2404941316.

The spelling of 12688546 in words is "twelve million, six hundred eighty-eight thousand, five hundred forty-six".