42040022 has 4 divisors (see below), whose sum is σ = 63060036. Its totient is φ = 21020010.

The previous prime is 42040007. The next prime is 42040051. The reversal of 42040022 is 22004024.

It is a happy number.

42040022 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 junction number, because it is equal to n+sod(n) for n = 42039979 and 42040006.

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 as a sum of consecutive naturals, namely, 10510004 + ... + 10510007.

It is an arithmetic number, because the mean of its divisors is an integer number (15765009).

Almost surely, 2^42040022 is an apocalyptic number.

42040022 is a deficient number, since it is larger than the sum of its proper divisors (21020014).

42040022 is a wasteful number, since it uses less digits than its factorization.

42040022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21020013.

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 42040022 is about 6483.8277275079. The cubic root of 42040022 is about 347.7130401816.

Adding to 42040022 its reverse (22004024), we get a palindrome (64044046).

The spelling of 42040022 in words is "forty-two million, forty thousand, twenty-two".