12648578 has 16 divisors (see below), whose sum is σ = 20279160. Its totient is φ = 5895936.

The previous prime is 12648569. The next prime is 12648613. The reversal of 12648578 is 87584621.

It can be written as a sum of positive squares in 4 ways, for example, as 12439729 + 208849 = 3527^2 + 457^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2000 + ... + 5412.

Almost surely, 2^12648578 is an apocalyptic number.

12648578 is a deficient number, since it is larger than the sum of its proper divisors (7630582).

12648578 is a wasteful number, since it uses less digits than its factorization.

12648578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3541.

The product of its digits is 107520, while the sum is 41.

The square root of 12648578 is about 3556.4839378240. The cubic root of 12648578 is about 232.9953396625.

The spelling of 12648578 in words is "twelve million, six hundred forty-eight thousand, five hundred seventy-eight".