120000042 has 40 divisors (see below), whose sum is σ = 284712516. Its totient is φ = 37646208.

The previous prime is 120000031. The next prime is 120000043. The reversal of 120000042 is 240000021.

It can be written as a sum of positive squares in 2 ways, for example, as 114896961 + 5103081 = 10719^2 + 2259^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 119999979 and 120000033.

It is not an unprimeable number, because it can be changed into a prime (120000043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19033 + ... + 24540.

Almost surely, 2^120000042 is an apocalyptic number.

120000042 is an abundant number, since it is smaller than the sum of its proper divisors (164712474).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

120000042 is a wasteful number, since it uses less digits than its factorization.

120000042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43604 (or 43595 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 120000042 is about 10954.4530671321. The cubic root of 120000042 is about 493.2424724110.

Adding to 120000042 its reverse (240000021), we get a palindrome (360000063).

The spelling of 120000042 in words is "one hundred twenty million, forty-two", and thus it is an aban number.