42042824 has 16 divisors (see below), whose sum is σ = 78929100. Its totient is φ = 20995072.

The previous prime is 42042823. The next prime is 42042829. The reversal of 42042824 is 42824024.

It can be written as a sum of positive squares in 2 ways, for example, as 30360100 + 11682724 = 5510^2 + 3418^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42042793 and 42042802.

It is not an unprimeable number, because it can be changed into a prime (42042821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4604 + ... + 10260.

Almost surely, 2^42042824 is an apocalyptic number.

It is an amenable number.

42042824 is a deficient number, since it is larger than the sum of its proper divisors (36886276).

42042824 is a wasteful number, since it uses less digits than its factorization.

42042824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6592 (or 6588 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 26.

The square root of 42042824 is about 6484.0437999754. The cubic root of 42042824 is about 347.7207651244.

Adding to 42042824 its reverse (42824024), we get a palindrome (84866848).

The spelling of 42042824 in words is "forty-two million, forty-two thousand, eight hundred twenty-four".