120040042 has 4 divisors (see below), whose sum is σ = 180060066. Its totient is φ = 60020020.

The previous prime is 120040033. The next prime is 120040069. The reversal of 120040042 is 240040021.

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., 118352641 + 1687401 = 10879^2 + 1299^2 .

It is a super-2 number, since 2×120040042² = 28819223366723528, which contains 22 as substring.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30010009 + ... + 30010012.

Almost surely, 2^120040042 is an apocalyptic number.

120040042 is a deficient number, since it is larger than the sum of its proper divisors (60020024).

120040042 is an equidigital number, since it uses as much as digits as its factorization.

120040042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60020023.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 120040042 is about 10956.2786565512. The cubic root of 120040042 is about 493.2972710227.

Adding to 120040042 its reverse (240040021), we get a palindrome (360080063).

The spelling of 120040042 in words is "one hundred twenty million, forty thousand, forty-two".