12112978 has 8 divisors (see below), whose sum is σ = 18201600. Its totient is φ = 6045780.

The previous prime is 12112967. The next prime is 12112979. The reversal of 12112978 is 87921121.

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

It is not an unprimeable number, because it can be changed into a prime (12112979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3858 + ... + 6253.

It is an arithmetic number, because the mean of its divisors is an integer number (2275200).

Almost surely, 2^12112978 is an apocalyptic number.

12112978 is a deficient number, since it is larger than the sum of its proper divisors (6088622).

12112978 is a wasteful number, since it uses less digits than its factorization.

12112978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10712.

The product of its digits is 2016, while the sum is 31.

The square root of 12112978 is about 3480.3703825886. The cubic root of 12112978 is about 229.6590916753.

The spelling of 12112978 in words is "twelve million, one hundred twelve thousand, nine hundred seventy-eight".