12181065 has 16 divisors (see below), whose sum is σ = 20989248. Its totient is φ = 5996736.

The previous prime is 12181063. The next prime is 12181079. The reversal of 12181065 is 56018121.

It is not a de Polignac number, because 12181065 - 2¹ = 12181063 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12181063) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31039 + ... + 31428.

It is an arithmetic number, because the mean of its divisors is an integer number (1311828).

Almost surely, 2^12181065 is an apocalyptic number.

12181065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12181065 is a deficient number, since it is larger than the sum of its proper divisors (8808183).

12181065 is a wasteful number, since it uses less digits than its factorization.

12181065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62488.

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 12181065 is about 3490.1382494108. The cubic root of 12181065 is about 230.0885922104.

Adding to 12181065 its reverse (56018121), we get a palindrome (68199186).

The spelling of 12181065 in words is "twelve million, one hundred eighty-one thousand, sixty-five".