12638570 has 24 divisors (see below), whose sum is σ = 26464644. Its totient is φ = 4333056.

The previous prime is 12638551. The next prime is 12638581. The reversal of 12638570 is 7583621.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11336689 + 1301881 = 3367^2 + 1141^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12407 + ... + 13386.

Almost surely, 2^12638570 is an apocalyptic number.

12638570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12638570 is an abundant number, since it is smaller than the sum of its proper divisors (13826074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12638570 is a wasteful number, since it uses less digits than its factorization.

12638570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25814 (or 25807 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 12638570 is about 3555.0766517756. The cubic root of 12638570 is about 232.9338720774.

The spelling of 12638570 in words is "twelve million, six hundred thirty-eight thousand, five hundred seventy".