12638842 has 8 divisors (see below), whose sum is σ = 18994932. Its totient is φ = 6307200.

The previous prime is 12638839. The next prime is 12638849. The reversal of 12638842 is 24883621.

12638842 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 2 ways, for example, as 12609601 + 29241 = 3551^2 + 171^2 .

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 = 12638798 and 12638807.

It is not an unprimeable number, because it can be changed into a prime (12638849) 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, 4759 + ... + 6922.

Almost surely, 2^12638842 is an apocalyptic number.

12638842 is a deficient number, since it is larger than the sum of its proper divisors (6356090).

12638842 is a wasteful number, since it uses less digits than its factorization.

12638842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12224.

The product of its digits is 18432, while the sum is 34.

The square root of 12638842 is about 3555.1149067224. The cubic root of 12638842 is about 232.9355430881.

The spelling of 12638842 in words is "twelve million, six hundred thirty-eight thousand, eight hundred forty-two".