12155185 has 12 divisors (see below), whose sum is σ = 16967988. Its totient is φ = 8334816.

The previous prime is 12155183. The next prime is 12155191. The reversal of 12155185 is 58155121.

It can be written as a sum of positive squares in 2 ways, for example, as 1238769 + 10916416 = 1113^2 + 3304^2 .

It is not a de Polignac number, because 12155185 - 2¹ = 12155183 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12155183) 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 11 ways as a sum of consecutive naturals, for example, 24562 + ... + 25051.

It is an arithmetic number, because the mean of its divisors is an integer number (1413999).

Almost surely, 2^12155185 is an apocalyptic number.

It is an amenable number.

12155185 is a deficient number, since it is larger than the sum of its proper divisors (4812803).

12155185 is an equidigital number, since it uses as much as digits as its factorization.

12155185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49632 (or 49625 counting only the distinct ones).

The product of its digits is 2000, while the sum is 28.

The square root of 12155185 is about 3486.4286885006. The cubic root of 12155185 is about 229.9255272435.

It can be divided in two parts, 1215 and 5185, that added together give a square (6400 = 80²).

The spelling of 12155185 in words is "twelve million, one hundred fifty-five thousand, one hundred eighty-five".