12131178 has 8 divisors (see below), whose sum is σ = 24262368. Its totient is φ = 4043724.

The previous prime is 12131173. The next prime is 12131179. The reversal of 12131178 is 87113121.

It is a happy number.

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

12131178 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (12131173) 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 3 ways as a sum of consecutive naturals, for example, 1010926 + ... + 1010937.

It is an arithmetic number, because the mean of its divisors is an integer number (3032796).

Almost surely, 2^12131178 is an apocalyptic number.

12131178 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12131178 is a wasteful number, since it uses less digits than its factorization.

12131178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2021868.

The product of its digits is 336, while the sum is 24.

The square root of 12131178 is about 3482.9840654244. The cubic root of 12131178 is about 229.7740566273.

Adding to 12131178 its reverse (87113121), we get a palindrome (99244299).

The spelling of 12131178 in words is "twelve million, one hundred thirty-one thousand, one hundred seventy-eight".