12138268 has 12 divisors (see below), whose sum is σ = 21590632. Its totient is φ = 5969520.

The previous prime is 12138263. The next prime is 12138277. The reversal of 12138268 is 86283121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12138263) 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 3 ways as a sum of consecutive naturals, for example, 24630 + ... + 25117.

Almost surely, 2^12138268 is an apocalyptic number.

It is an amenable number.

12138268 is a deficient number, since it is larger than the sum of its proper divisors (9452364).

12138268 is a wasteful number, since it uses less digits than its factorization.

12138268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49812 (or 49810 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 12138268 is about 3484.0017221580. The cubic root of 12138268 is about 229.8188113025.

The spelling of 12138268 in words is "twelve million, one hundred thirty-eight thousand, two hundred sixty-eight".