142243123 has 12 divisors (see below), whose sum is σ = 157185784. Its totient is φ = 128620800.

The previous prime is 142243117. The next prime is 142243141. The reversal of 142243123 is 321342241.

It is a de Polignac number, because none of the positive numbers 2^k-142243123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142243094 and 142243103.

It is not an unprimeable number, because it can be changed into a prime (142243223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20308 + ... + 26398.

Almost surely, 2^142243123 is an apocalyptic number.

142243123 is a deficient number, since it is larger than the sum of its proper divisors (14942661).

142243123 is a wasteful number, since it uses less digits than its factorization.

142243123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6306 (or 6295 counting only the distinct ones).

The product of its digits is 1152, while the sum is 22.

The square root of 142243123 is about 11926.5721395546. The cubic root of 142243123 is about 522.0079208342.

Adding to 142243123 its reverse (321342241), we get a palindrome (463585364).

The spelling of 142243123 in words is "one hundred forty-two million, two hundred forty-three thousand, one hundred twenty-three".