340120042 has 4 divisors (see below), whose sum is σ = 510180066. Its totient is φ = 170060020.

The previous prime is 340120013. The next prime is 340120057. The reversal of 340120042 is 240021043.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 312547041 + 27573001 = 17679^2 + 5251^2 .

It is a junction number, because it is equal to n+sod(n) for n = 340119998 and 340120025.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85030009 + ... + 85030012.

Almost surely, 2^340120042 is an apocalyptic number.

340120042 is a deficient number, since it is larger than the sum of its proper divisors (170060024).

340120042 is a wasteful number, since it uses less digits than its factorization.

340120042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170060023.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 340120042 is about 18442.3437230738. The cubic root of 340120042 is about 698.0353359067.

Adding to 340120042 its reverse (240021043), we get a palindrome (580141085).

The spelling of 340120042 in words is "three hundred forty million, one hundred twenty thousand, forty-two".