12115780 has 12 divisors (see below), whose sum is σ = 25443180. Its totient is φ = 4846304.

The previous prime is 12115769. The next prime is 12115783. The reversal of 12115780 is 8751121.

It can be written as a sum of positive squares in 2 ways, for example, as 6240004 + 5875776 = 2498^2 + 2424^2 .

It is not an unprimeable number, because it can be changed into a prime (12115783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302875 + ... + 302914.

It is an arithmetic number, because the mean of its divisors is an integer number (2120265).

Almost surely, 2^12115780 is an apocalyptic number.

12115780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12115780 is an abundant number, since it is smaller than the sum of its proper divisors (13327400).

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

12115780 is a wasteful number, since it uses less digits than its factorization.

12115780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605798 (or 605796 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 25.

The square root of 12115780 is about 3480.7729026755. The cubic root of 12115780 is about 229.6767987209.

The spelling of 12115780 in words is "twelve million, one hundred fifteen thousand, seven hundred eighty".