42040242 has 16 divisors (see below), whose sum is σ = 93422880. Its totient is φ = 14013396.

The previous prime is 42040199. The next prime is 42040249. The reversal of 42040242 is 24204024.

42040242 is a `hidden beast` number, since 420 + 4 + 0 + 242 = 666.

42040242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (42040249) 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 7 ways as a sum of consecutive naturals, for example, 389208 + ... + 389315.

It is an arithmetic number, because the mean of its divisors is an integer number (5838930).

Almost surely, 2^42040242 is an apocalyptic number.

42040242 is an abundant number, since it is smaller than the sum of its proper divisors (51382638).

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

42040242 is a wasteful number, since it uses less digits than its factorization.

42040242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778534 (or 778528 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 42040242 is about 6483.8446927730. The cubic root of 42040242 is about 347.7136467206.

Adding to 42040242 its reverse (24204024), we get a palindrome (66244266).

It can be divided in two parts, 4204024 and 2, that multiplied together give a palindrome (8408048).

The spelling of 42040242 in words is "forty-two million, forty thousand, two hundred forty-two".