12117508 has 24 divisors (see below), whose sum is σ = 22971200. Its totient is φ = 5559840.

The previous prime is 12117503. The next prime is 12117517. The reversal of 12117508 is 80571121.

It is not an unprimeable number, because it can be changed into a prime (12117503) 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, 9763 + ... + 10933.

Almost surely, 2^12117508 is an apocalyptic number.

It is an amenable number.

12117508 is a deficient number, since it is larger than the sum of its proper divisors (10853692).

12117508 is a wasteful number, since it uses less digits than its factorization.

12117508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387 (or 1385 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 25.

The square root of 12117508 is about 3481.0211145582. The cubic root of 12117508 is about 229.6877173367.

Adding to 12117508 its reverse (80571121), we get a palindrome (92688629).

The spelling of 12117508 in words is "twelve million, one hundred seventeen thousand, five hundred eight".