12117143 has 4 divisors (see below), whose sum is σ = 12242160. Its totient is φ = 11992128.

The previous prime is 12117121. The next prime is 12117221. The reversal of 12117143 is 34171121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12117143 - 2⁸ = 12116887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12117043) 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, 62363 + ... + 62556.

It is an arithmetic number, because the mean of its divisors is an integer number (3060540).

Almost surely, 2^12117143 is an apocalyptic number.

12117143 is a deficient number, since it is larger than the sum of its proper divisors (125017).

12117143 is an equidigital number, since it uses as much as digits as its factorization.

12117143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125016.

The product of its digits is 168, while the sum is 20.

The square root of 12117143 is about 3480.9686870180. The cubic root of 12117143 is about 229.6854111183.

Adding to 12117143 its reverse (34171121), we get a palindrome (46288264).

The spelling of 12117143 in words is "twelve million, one hundred seventeen thousand, one hundred forty-three".