42006422 has 16 divisors (see below), whose sum is σ = 67977792. Its totient is φ = 19393920.

The previous prime is 42006421. The next prime is 42006443. The reversal of 42006422 is 22460024.

42006422 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 = 42006394 and 42006403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42006421) 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, 9854 + ... + 13457.

It is an arithmetic number, because the mean of its divisors is an integer number (4248612).

Almost surely, 2^42006422 is an apocalyptic number.

42006422 is a deficient number, since it is larger than the sum of its proper divisors (25971370).

42006422 is a wasteful number, since it uses less digits than its factorization.

42006422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23383.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 42006422 is about 6481.2361475262. The cubic root of 42006422 is about 347.6203802866.

Adding to 42006422 its reverse (22460024), we get a palindrome (64466446).

The spelling of 42006422 in words is "forty-two million, six thousand, four hundred twenty-two".