12180520 has 128 divisors (see below), whose sum is σ = 33177600. Its totient is φ = 3974400.

The previous prime is 12180503. The next prime is 12180527. The reversal of 12180520 is 2508121.

12180520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12180527) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 259137 + ... + 259183.

It is an arithmetic number, because the mean of its divisors is an integer number (259200).

Almost surely, 2^12180520 is an apocalyptic number.

12180520 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 12180520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16588800).

12180520 is an abundant number, since it is smaller than the sum of its proper divisors (20997080).

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

12180520 is a wasteful number, since it uses less digits than its factorization.

12180520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 12180520 is about 3490.0601714011. The cubic root of 12180520 is about 230.0851606507.

Adding to 12180520 its reverse (2508121), we get a palindrome (14688641).

The spelling of 12180520 in words is "twelve million, one hundred eighty thousand, five hundred twenty".