142442042 has 4 divisors (see below), whose sum is σ = 213663066. Its totient is φ = 71221020.

The previous prime is 142442029. The next prime is 142442071. The reversal of 142442042 is 240244241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240244241 = 73 ⋅3291017.

It can be written as a sum of positive squares in only one way, i.e., 82828201 + 59613841 = 9101^2 + 7721^2 .

It is a super-3 number, since 3×142442042³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 142441999 and 142442017.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35610509 + ... + 35610512.

Almost surely, 2^142442042 is an apocalyptic number.

142442042 is a deficient number, since it is larger than the sum of its proper divisors (71221024).

142442042 is an equidigital number, since it uses as much as digits as its factorization.

142442042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71221023.

The product of its (nonzero) digits is 2048, while the sum is 23.

The square root of 142442042 is about 11934.9085459420. The cubic root of 142442042 is about 522.2511403901.

Adding to 142442042 its reverse (240244241), we get a palindrome (382686283).

The spelling of 142442042 in words is "one hundred forty-two million, four hundred forty-two thousand, forty-two".