42005422 has 4 divisors (see below), whose sum is σ = 63008136. Its totient is φ = 21002710.

The previous prime is 42005417. The next prime is 42005423. The reversal of 42005422 is 22450024.

42005422 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a self number, because there is not a number n which added to its sum of digits gives 42005422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42005423) 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 as a sum of consecutive naturals, namely, 10501354 + ... + 10501357.

It is an arithmetic number, because the mean of its divisors is an integer number (15752034).

Almost surely, 2^42005422 is an apocalyptic number.

42005422 is a deficient number, since it is larger than the sum of its proper divisors (21002714).

42005422 is a wasteful number, since it uses less digits than its factorization.

42005422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21002713.

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 42005422 is about 6481.1590012898. The cubic root of 42005422 is about 347.6176217946.

Adding to 42005422 its reverse (22450024), we get a palindrome (64455446).

The spelling of 42005422 in words is "forty-two million, five thousand, four hundred twenty-two".