123140142 has 32 divisors (see below), whose sum is σ = 276477600. Its totient is φ = 40621824.

The previous prime is 123140117. The next prime is 123140191. The reversal of 123140142 is 241041321.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6517 + ... + 16992.

It is an arithmetic number, because the mean of its divisors is an integer number (8639925).

Almost surely, 2^123140142 is an apocalyptic number.

123140142 is an abundant number, since it is smaller than the sum of its proper divisors (153337458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123140142 is a wasteful number, since it uses less digits than its factorization.

123140142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23617 (or 23611 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 123140142 is about 11096.8527970772. The cubic root of 123140142 is about 497.5077877286.

Adding to 123140142 its reverse (241041321), we get a palindrome (364181463).

The spelling of 123140142 in words is "one hundred twenty-three million, one hundred forty thousand, one hundred forty-two".