142042123 has 4 divisors (see below), whose sum is σ = 150397560. Its totient is φ = 133686688.

The previous prime is 142042111. The next prime is 142042127. The reversal of 142042123 is 321240241.

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 142042123 - 2⁵ = 142042091 is a prime.

It is a super-3 number, since 3×142042123³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 142042123.

It is not an unprimeable number, because it can be changed into a prime (142042127) 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, 4177693 + ... + 4177726.

It is an arithmetic number, because the mean of its divisors is an integer number (37599390).

Almost surely, 2^142042123 is an apocalyptic number.

142042123 is a deficient number, since it is larger than the sum of its proper divisors (8355437).

142042123 is an equidigital number, since it uses as much as digits as its factorization.

142042123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8355436.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 142042123 is about 11918.1425985763. The cubic root of 142042123 is about 521.7619263934.

Adding to 142042123 its reverse (321240241), we get a palindrome (463282364).

The spelling of 142042123 in words is "one hundred forty-two million, forty-two thousand, one hundred twenty-three".