12117238 has 16 divisors (see below), whose sum is σ = 20934144. Its totient is φ = 5152680.

The previous prime is 12117233. The next prime is 12117247. The reversal of 12117238 is 83271121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12117233) 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, 1470 + ... + 5137.

It is an arithmetic number, because the mean of its divisors is an integer number (1308384).

Almost surely, 2^12117238 is an apocalyptic number.

12117238 is a deficient number, since it is larger than the sum of its proper divisors (8816906).

12117238 is a wasteful number, since it uses less digits than its factorization.

12117238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6747.

The product of its digits is 672, while the sum is 25.

The square root of 12117238 is about 3480.9823326182. The cubic root of 12117238 is about 229.6860113714.

Adding to 12117238 its reverse (83271121), we get a palindrome (95388359).

The spelling of 12117238 in words is "twelve million, one hundred seventeen thousand, two hundred thirty-eight".