42168242 has 8 divisors (see below), whose sum is σ = 63367596. Its totient is φ = 21045712.

The previous prime is 42168229. The next prime is 42168253. The reversal of 42168242 is 24286124.

It can be written as a sum of positive squares in 2 ways, for example, as 28633201 + 13535041 = 5351^2 + 3679^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17813 + ... + 20040.

Almost surely, 2^42168242 is an apocalyptic number.

42168242 is a deficient number, since it is larger than the sum of its proper divisors (21199354).

42168242 is a wasteful number, since it uses less digits than its factorization.

42168242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38412.

The product of its digits is 6144, while the sum is 29.

The square root of 42168242 is about 6493.7078776305. The cubic root of 42168242 is about 348.0661839594.

The spelling of 42168242 in words is "forty-two million, one hundred sixty-eight thousand, two hundred forty-two".