12108855 has 16 divisors (see below), whose sum is σ = 21135744. Its totient is φ = 5870880.

The previous prime is 12108853. The next prime is 12108893. The reversal of 12108855 is 55880121.

12108855 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12108855 - 2¹ = 12108853 is a prime.

It is a super-2 number, since 2×12108855² = 293248738822050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12108853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36529 + ... + 36858.

It is an arithmetic number, because the mean of its divisors is an integer number (1320984).

Almost surely, 2^12108855 is an apocalyptic number.

12108855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12108855 is a deficient number, since it is larger than the sum of its proper divisors (9026889).

12108855 is a wasteful number, since it uses less digits than its factorization.

12108855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73406.

The product of its (nonzero) digits is 3200, while the sum is 30.

The square root of 12108855 is about 3479.7780101610. The cubic root of 12108855 is about 229.6330316954.

Adding to 12108855 its reverse (55880121), we get a palindrome (67988976).

The spelling of 12108855 in words is "twelve million, one hundred eight thousand, eight hundred fifty-five".