12188115 has 24 divisors (see below), whose sum is σ = 21810048. Its totient is φ = 6289920.

The previous prime is 12188107. The next prime is 12188117. The reversal of 12188115 is 51188121.

It is not a de Polignac number, because 12188115 - 2³ = 12188107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12188117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2974 + ... + 5763.

It is an arithmetic number, because the mean of its divisors is an integer number (908752).

Almost surely, 2^12188115 is an apocalyptic number.

12188115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12188115 is a deficient number, since it is larger than the sum of its proper divisors (9621933).

12188115 is a wasteful number, since it uses less digits than its factorization.

12188115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8779 (or 8776 counting only the distinct ones).

The product of its digits is 640, while the sum is 27.

The square root of 12188115 is about 3491.1480919606. The cubic root of 12188115 is about 230.1329728873.

It can be divided in two parts, 1218811 and 5, that added together give a square (1218816 = 1104²).

The spelling of 12188115 in words is "twelve million, one hundred eighty-eight thousand, one hundred fifteen".