42016042 has 4 divisors (see below), whose sum is σ = 63024066. Its totient is φ = 21008020.

The previous prime is 42016033. The next prime is 42016043. The reversal of 42016042 is 24061024.

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., 39702601 + 2313441 = 6301^2 + 1521^2 .

It is not an unprimeable number, because it can be changed into a prime (42016043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10504009 + ... + 10504012.

Almost surely, 2^42016042 is an apocalyptic number.

42016042 is a deficient number, since it is larger than the sum of its proper divisors (21008024).

42016042 is a wasteful number, since it uses less digits than its factorization.

42016042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21008023.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 42016042 is about 6481.9782474180. The cubic root of 42016042 is about 347.6469147437.

Adding to 42016042 its reverse (24061024), we get a palindrome (66077066).

The spelling of 42016042 in words is "forty-two million, sixteen thousand, forty-two".