12681604 has 24 divisors (see below), whose sum is σ = 24674048. Its totient is φ = 5663520.

The previous prime is 12681601. The next prime is 12681619. The reversal of 12681604 is 40618621.

12681604 = 91² + 92² + ... + 338².

It is not an unprimeable number, because it can be changed into a prime (12681601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2322 + ... + 5545.

Almost surely, 2^12681604 is an apocalyptic number.

It is an amenable number.

12681604 is a deficient number, since it is larger than the sum of its proper divisors (11992444).

12681604 is a wasteful number, since it uses less digits than its factorization.

12681604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7915 (or 7913 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 12681604 is about 3561.1239798693. The cubic root of 12681604 is about 233.1979504894.

The spelling of 12681604 in words is "twelve million, six hundred eighty-one thousand, six hundred four".