12181286 has 16 divisors (see below), whose sum is σ = 19764864. Its totient is φ = 5597184.

The previous prime is 12181271. The next prime is 12181289. The reversal of 12181286 is 68218121.

It is a super-2 number, since 2×12181286² = 296767457227592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12181289) 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, 5771 + ... + 7593.

It is an arithmetic number, because the mean of its divisors is an integer number (1235304).

Almost surely, 2^12181286 is an apocalyptic number.

12181286 is a deficient number, since it is larger than the sum of its proper divisors (7583578).

12181286 is a wasteful number, since it uses less digits than its factorization.

12181286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2095.

The product of its digits is 1536, while the sum is 29.

The square root of 12181286 is about 3490.1699099041. The cubic root of 12181286 is about 230.0899836944.

The spelling of 12181286 in words is "twelve million, one hundred eighty-one thousand, two hundred eighty-six".