12143123 has 4 divisors (see below), whose sum is σ = 12152280. Its totient is φ = 12133968.

The previous prime is 12143119. The next prime is 12143137. The reversal of 12143123 is 32134121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 32134121 = 2477 ⋅12973.

It is a cyclic number.

It is not a de Polignac number, because 12143123 - 2² = 12143119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12143113) 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, 2165 + ... + 5382.

It is an arithmetic number, because the mean of its divisors is an integer number (3038070).

Almost surely, 2^12143123 is an apocalyptic number.

12143123 is a deficient number, since it is larger than the sum of its proper divisors (9157).

12143123 is an equidigital number, since it uses as much as digits as its factorization.

12143123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9156.

The product of its digits is 144, while the sum is 17.

The square root of 12143123 is about 3484.6984087579. The cubic root of 12143123 is about 229.8494477876.

Adding to 12143123 its reverse (32134121), we get a palindrome (44277244).

The spelling of 12143123 in words is "twelve million, one hundred forty-three thousand, one hundred twenty-three".