12115660 has 24 divisors (see below), whose sum is σ = 25986240. Its totient is φ = 4742784.

The previous prime is 12115651. The next prime is 12115661. The reversal of 12115660 is 6651121.

It is not an unprimeable number, because it can be changed into a prime (12115661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5505 + ... + 7384.

It is an arithmetic number, because the mean of its divisors is an integer number (1082760).

Almost surely, 2^12115660 is an apocalyptic number.

12115660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12115660 is an abundant number, since it is smaller than the sum of its proper divisors (13870580).

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

12115660 is a wasteful number, since it uses less digits than its factorization.

12115660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12945 (or 12943 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 12115660 is about 3480.7556650819. The cubic root of 12115660 is about 229.6760404451.

Adding to 12115660 its reverse (6651121), we get a palindrome (18766781).

The spelling of 12115660 in words is "twelve million, one hundred fifteen thousand, six hundred sixty".