42120124 has 12 divisors (see below), whose sum is σ = 74720464. Its totient is φ = 20771424.

The previous prime is 42120119. The next prime is 42120157. The reversal of 42120124 is 42102124.

42120124 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 42120098 and 42120107.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 71832 + ... + 72415.

Almost surely, 2^42120124 is an apocalyptic number.

It is an amenable number.

42120124 is a deficient number, since it is larger than the sum of its proper divisors (32600340).

42120124 is a wasteful number, since it uses less digits than its factorization.

42120124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144324 (or 144322 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 42120124 is about 6490.0018489982. The cubic root of 42120124 is about 347.9337412937.

Adding to 42120124 its reverse (42102124), we get a palindrome (84222248).

The spelling of 42120124 in words is "forty-two million, one hundred twenty thousand, one hundred twenty-four".