142019123 has 2 divisors, whose sum is σ = 142019124. Its totient is φ = 142019122.

The previous prime is 142019117. The next prime is 142019161. The reversal of 142019123 is 321910241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142019123 - 2⁴ = 142019107 is a prime.

It is a super-3 number, since 3×142019123³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (142016123) 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 as a sum of consecutive naturals, namely, 71009561 + 71009562.

It is an arithmetic number, because the mean of its divisors is an integer number (71009562).

Almost surely, 2^142019123 is an apocalyptic number.

142019123 is a deficient number, since it is larger than the sum of its proper divisors (1).

142019123 is an equidigital number, since it uses as much as digits as its factorization.

142019123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 142019123 is about 11917.1776440565. The cubic root of 142019123 is about 521.7337629823.

Adding to 142019123 its reverse (321910241), we get a palindrome (463929364).

The spelling of 142019123 in words is "one hundred forty-two million, nineteen thousand, one hundred twenty-three".