42422420042 has 4 divisors (see below), whose sum is σ = 63633630066. Its totient is φ = 21211210020.

The previous prime is 42422420039. The next prime is 42422420063. The reversal of 42422420042 is 24002422424.

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

It can be written as a sum of positive squares in only one way, i.e., 40405422121 + 2016997921 = 201011^2 + 44911^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42422419993 and 42422420020.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605605009 + ... + 10605605012.

Almost surely, 2^42422420042 is an apocalyptic number.

42422420042 is a deficient number, since it is larger than the sum of its proper divisors (21211210024).

42422420042 is a wasteful number, since it uses less digits than its factorization.

42422420042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21211210023.

The product of its (nonzero) digits is 8192, while the sum is 26.

Adding to 42422420042 its reverse (24002422424), we get a palindrome (66424842466).

The spelling of 42422420042 in words is "forty-two billion, four hundred twenty-two million, four hundred twenty thousand, forty-two".