12117105 has 96 divisors (see below), whose sum is σ = 28304640. Its totient is φ = 4631040.

The previous prime is 12117059. The next prime is 12117121. The reversal of 12117105 is 50171121.

It is a happy number.

12117105 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12117105 - 2⁷ = 12116977 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 44911 + ... + 45179.

It is an arithmetic number, because the mean of its divisors is an integer number (294840).

Almost surely, 2^12117105 is an apocalyptic number.

12117105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12117105 is an abundant number, since it is smaller than the sum of its proper divisors (16187535).

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

12117105 is a wasteful number, since it uses less digits than its factorization.

12117105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311 (or 308 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 18.

The square root of 12117105 is about 3480.9632287630. The cubic root of 12117105 is about 229.6851710162.

Adding to 12117105 its reverse (50171121), we get a palindrome (62288226).

The spelling of 12117105 in words is "twelve million, one hundred seventeen thousand, one hundred five".