12185860 has 48 divisors (see below), whose sum is σ = 27216000. Its totient is φ = 4573184.

The previous prime is 12185843. The next prime is 12185863. The reversal of 12185860 is 6858121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12185863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26916 + ... + 27364.

It is an arithmetic number, because the mean of its divisors is an integer number (567000).

Almost surely, 2^12185860 is an apocalyptic number.

12185860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12185860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13608000).

12185860 is an abundant number, since it is smaller than the sum of its proper divisors (15030140).

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

12185860 is a wasteful number, since it uses less digits than its factorization.

12185860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540 (or 538 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 12185860 is about 3490.8251173612. The cubic root of 12185860 is about 230.1187792278.

The spelling of 12185860 in words is "twelve million, one hundred eighty-five thousand, eight hundred sixty".