12181874 has 8 divisors (see below), whose sum is σ = 18360048. Its totient is φ = 6061860.

The previous prime is 12181867. The next prime is 12181909. The reversal of 12181874 is 47818121.

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

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12181874.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 14012 + ... + 14855.

It is an arithmetic number, because the mean of its divisors is an integer number (2295006).

Almost surely, 2^12181874 is an apocalyptic number.

12181874 is a deficient number, since it is larger than the sum of its proper divisors (6178174).

12181874 is a wasteful number, since it uses less digits than its factorization.

12181874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29080.

The product of its digits is 3584, while the sum is 32.

The square root of 12181874 is about 3490.2541454742. The cubic root of 12181874 is about 230.0936858414.

Adding to 12181874 its reverse (47818121), we get a palindrome (59999995).

The spelling of 12181874 in words is "twelve million, one hundred eighty-one thousand, eight hundred seventy-four".