12127638 has 16 divisors (see below), whose sum is σ = 24911280. Its totient is φ = 3933216.

The previous prime is 12127637. The next prime is 12127663. The reversal of 12127638 is 83672121.

12127638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12127637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27093 + ... + 27536.

It is an arithmetic number, because the mean of its divisors is an integer number (1556955).

Almost surely, 2^12127638 is an apocalyptic number.

12127638 is an abundant number, since it is smaller than the sum of its proper divisors (12783642).

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

12127638 is a wasteful number, since it uses less digits than its factorization.

12127638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54671.

The product of its digits is 4032, while the sum is 30.

The square root of 12127638 is about 3482.4758434194. The cubic root of 12127638 is about 229.7517043245.

Adding to 12127638 its reverse (83672121), we get a palindrome (95799759).

The spelling of 12127638 in words is "twelve million, one hundred twenty-seven thousand, six hundred thirty-eight".