12117812 has 24 divisors (see below), whose sum is σ = 24314304. Its totient is φ = 5176512.

The previous prime is 12117811. The next prime is 12117817. The reversal of 12117812 is 21871121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12117811) 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, 12323 + ... + 13269.

It is an arithmetic number, because the mean of its divisors is an integer number (1013096).

Almost surely, 2^12117812 is an apocalyptic number.

It is an amenable number.

12117812 is an abundant number, since it is smaller than the sum of its proper divisors (12196492).

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

12117812 is a wasteful number, since it uses less digits than its factorization.

12117812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1415 (or 1413 counting only the distinct ones).

The product of its digits is 224, while the sum is 23.

The square root of 12117812 is about 3481.0647796328. The cubic root of 12117812 is about 229.6896380969.

Adding to 12117812 its reverse (21871121), we get a palindrome (33988933).

The spelling of 12117812 in words is "twelve million, one hundred seventeen thousand, eight hundred twelve".