12185118 has 96 divisors (see below), whose sum is σ = 31449600. Its totient is φ = 3369600.

The previous prime is 12185113. The next prime is 12185119. The reversal of 12185118 is 81158121.

It is a junction number, because it is equal to n+sod(n) for n = 12185091 and 12185100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12185113) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 154203 + ... + 154281.

It is an arithmetic number, because the mean of its divisors is an integer number (327600).

Almost surely, 2^12185118 is an apocalyptic number.

12185118 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12185118, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15724800).

12185118 is an abundant number, since it is smaller than the sum of its proper divisors (19264482).

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

12185118 is a wasteful number, since it uses less digits than its factorization.

12185118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 155 counting only the distinct ones).

The product of its digits is 640, while the sum is 27.

The square root of 12185118 is about 3490.7188371452. The cubic root of 12185118 is about 230.1141084701.

It can be divided in two parts, 1218 and 5118, that added together give a palindrome (6336).

The spelling of 12185118 in words is "twelve million, one hundred eighty-five thousand, one hundred eighteen".