142400042 has 4 divisors (see below), whose sum is σ = 213600066. Its totient is φ = 71200020.

The previous prime is 142400021. The next prime is 142400053. The reversal of 142400042 is 240004241.

142400042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240004241 = 23 ⋅10434967.

It can be written as a sum of positive squares in only one way, i.e., 139263601 + 3136441 = 11801^2 + 1771^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35600009 + ... + 35600012.

Almost surely, 2^142400042 is an apocalyptic number.

142400042 is a deficient number, since it is larger than the sum of its proper divisors (71200024).

142400042 is an equidigital number, since it uses as much as digits as its factorization.

142400042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71200023.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 142400042 is about 11933.1488719449. The cubic root of 142400042 is about 522.1998055834.

Adding to 142400042 its reverse (240004241), we get a palindrome (382404283).

The spelling of 142400042 in words is "one hundred forty-two million, four hundred thousand, forty-two".