12000138 has 16 divisors (see below), whose sum is σ = 24155040. Its totient is φ = 3974256.

The previous prime is 12000133. The next prime is 12000239. The reversal of 12000138 is 83100021.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12000133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5428 + ... + 7311.

It is an arithmetic number, because the mean of its divisors is an integer number (1509690).

Almost surely, 2^12000138 is an apocalyptic number.

12000138 is an abundant number, since it is smaller than the sum of its proper divisors (12154902).

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

12000138 is a wasteful number, since it uses less digits than its factorization.

12000138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12901.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 12000138 is about 3464.1215336648. The cubic root of 12000138 is about 228.9437261216.

Adding to 12000138 its reverse (83100021), we get a palindrome (95100159).

It can be divided in two parts, 1200013 and 8, that added together give a palindrome (1200021).

The spelling of 12000138 in words is "twelve million, one hundred thirty-eight", and thus it is an aban number.