123442143 has 12 divisors (see below), whose sum is σ = 180912984. Its totient is φ = 74813200.

The previous prime is 123442139. The next prime is 123442153. The reversal of 123442143 is 341244321.

It is not a de Polignac number, because 123442143 - 2² = 123442139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123442133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169668 + ... + 170393.

It is an arithmetic number, because the mean of its divisors is an integer number (15076082).

Almost surely, 2^123442143 is an apocalyptic number.

123442143 is a deficient number, since it is larger than the sum of its proper divisors (57470841).

123442143 is a wasteful number, since it uses less digits than its factorization.

123442143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340086 (or 340075 counting only the distinct ones).

The product of its digits is 2304, while the sum is 24.

The square root of 123442143 is about 11110.4519710046. The cubic root of 123442143 is about 497.9141680432.

Adding to 123442143 its reverse (341244321), we get a palindrome (464686464).

The spelling of 123442143 in words is "one hundred twenty-three million, four hundred forty-two thousand, one hundred forty-three".