134840042 has 4 divisors (see below), whose sum is σ = 202260066. Its totient is φ = 67420020.

The previous prime is 134840033. The next prime is 134840059. The reversal of 134840042 is 240048431.

134840042 is digitally balanced in base 2 and base 3, because in such bases 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: 240048431 = 7 ⋅34292633.

It can be written as a sum of positive squares in only one way, i.e., 90231001 + 44609041 = 9499^2 + 6679^2 .

It is a junction number, because it is equal to n+sod(n) for n = 134839993 and 134840020.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33710009 + ... + 33710012.

Almost surely, 2^134840042 is an apocalyptic number.

134840042 is a deficient number, since it is larger than the sum of its proper divisors (67420024).

134840042 is an equidigital number, since it uses as much as digits as its factorization.

134840042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67420023.

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 134840042 is about 11612.0645020599. The cubic root of 134840042 is about 512.7900933110.

Adding to 134840042 its reverse (240048431), we get a palindrome (374888473).

The spelling of 134840042 in words is "one hundred thirty-four million, eight hundred forty thousand, forty-two".