12112857 has 18 divisors (see below), whose sum is σ = 18590078. Its totient is φ = 7598592.

The previous prime is 12112819. The next prime is 12112883. The reversal of 12112857 is 75821121.

It can be written as a sum of positive squares in 3 ways, for example, as 2509056 + 9603801 = 1584^2 + 3099^2 .

It is not a de Polignac number, because 12112857 - 2¹⁰ = 12111833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12112857.

It is not an unprimeable number, because it can be changed into a prime (12112897) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 273 + ... + 4929.

Almost surely, 2^12112857 is an apocalyptic number.

12112857 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12112857 is a deficient number, since it is larger than the sum of its proper divisors (6477221).

12112857 is a wasteful number, since it uses less digits than its factorization.

12112857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4697 (or 4677 counting only the distinct ones).

The product of its digits is 1120, while the sum is 27.

The square root of 12112857 is about 3480.3529993379. The cubic root of 12112857 is about 229.6583269626.

Adding to 12112857 its reverse (75821121), we get a palindrome (87933978).

The spelling of 12112857 in words is "twelve million, one hundred twelve thousand, eight hundred fifty-seven".