12204138 has 8 divisors (see below), whose sum is σ = 24408288. Its totient is φ = 4068044.

The previous prime is 12204109. The next prime is 12204139. The reversal of 12204138 is 83140221.

12204138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

12204138 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (12204139) 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, 1017006 + ... + 1017017.

It is an arithmetic number, because the mean of its divisors is an integer number (3051036).

Almost surely, 2^12204138 is an apocalyptic number.

12204138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12204138 is a wasteful number, since it uses less digits than its factorization.

12204138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2034028.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 12204138 is about 3493.4421420713. The cubic root of 12204138 is about 230.2337761678.

Adding to 12204138 its reverse (83140221), we get a palindrome (95344359).

The spelling of 12204138 in words is "twelve million, two hundred four thousand, one hundred thirty-eight".