12521650 has 12 divisors (see below), whose sum is σ = 23290362. Its totient is φ = 5008640.

The previous prime is 12521623. The next prime is 12521669. The reversal of 12521650 is 5612521.

12521650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 8485569 + 4036081 = 2913^2 + 2009^2 .

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 125167 + ... + 125266.

Almost surely, 2^12521650 is an apocalyptic number.

12521650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12521650 is a deficient number, since it is larger than the sum of its proper divisors (10768712).

12521650 is a wasteful number, since it uses less digits than its factorization.

12521650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250445 (or 250440 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 12521650 is about 3538.5943536947. The cubic root of 12521650 is about 232.2133515974.

The spelling of 12521650 in words is "twelve million, five hundred twenty-one thousand, six hundred fifty".