12183981 has 8 divisors (see below), whose sum is σ = 16314240. Its totient is φ = 8088192.

The previous prime is 12183971. The next prime is 12184009. The reversal of 12183981 is 18938121.

12183981 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12183981 - 2⁵ = 12183949 is a prime.

It is a super-2 number, since 2×12183981² = 296898786016722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12183931) 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, 7780 + ... + 9213.

It is an arithmetic number, because the mean of its divisors is an integer number (2039280).

Almost surely, 2^12183981 is an apocalyptic number.

It is an amenable number.

12183981 is a deficient number, since it is larger than the sum of its proper divisors (4130259).

12183981 is a wasteful number, since it uses less digits than its factorization.

12183981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17235.

The product of its digits is 3456, while the sum is 33.

The square root of 12183981 is about 3490.5559729075. Note that the first 3 decimals coincide. The cubic root of 12183981 is about 230.1069508898.

The spelling of 12183981 in words is "twelve million, one hundred eighty-three thousand, nine hundred eighty-one".