42816042 has 12 divisors (see below), whose sum is σ = 92768130. Its totient is φ = 14272008.

The previous prime is 42816029. The next prime is 42816061. The reversal of 42816042 is 24061824.

It can be written as a sum of positive squares in only one way, i.e., 24591681 + 18224361 = 4959^2 + 4269^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42815997 and 42816015.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1189317 + ... + 1189352.

Almost surely, 2^42816042 is an apocalyptic number.

42816042 is an abundant number, since it is smaller than the sum of its proper divisors (49952088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42816042 is a wasteful number, since it uses less digits than its factorization.

42816042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2378677 (or 2378674 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 42816042 is about 6543.3968242802. The cubic root of 42816042 is about 349.8394964753.

Adding to 42816042 its reverse (24061824), we get a palindrome (66877866).

The spelling of 42816042 in words is "forty-two million, eight hundred sixteen thousand, forty-two".