12181300 has 36 divisors (see below), whose sum is σ = 26618956. Its totient is φ = 4838400.

The previous prime is 12181289. The next prime is 12181313. The reversal of 12181300 is 318121.

It can be written as a sum of positive squares in 6 ways, for example, as 3549456 + 8631844 = 1884^2 + 2938^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17764 + ... + 18436.

Almost surely, 2^12181300 is an apocalyptic number.

12181300 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 12181300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13309478).

12181300 is an abundant number, since it is smaller than the sum of its proper divisors (14437656).

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

12181300 is a wasteful number, since it uses less digits than its factorization.

12181300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868 (or 861 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 12181300 is about 3490.1719155365. The cubic root of 12181300 is about 230.0900718421.

Adding to 12181300 its reverse (318121), we get a palindrome (12499421).

The spelling of 12181300 in words is "twelve million, one hundred eighty-one thousand, three hundred".