42242185 has 4 divisors (see below), whose sum is σ = 50690628. Its totient is φ = 33793744.

The previous prime is 42242173. The next prime is 42242251. The reversal of 42242185 is 58124224.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15657849 + 26584336 = 3957^2 + 5156^2 .

It is a cyclic number.

It is not a de Polignac number, because 42242185 - 2⁵ = 42242153 is a prime.

It is a Duffinian number.

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, 4224214 + ... + 4224223.

It is an arithmetic number, because the mean of its divisors is an integer number (12672657).

Almost surely, 2^42242185 is an apocalyptic number.

It is an amenable number.

42242185 is a deficient number, since it is larger than the sum of its proper divisors (8448443).

42242185 is an equidigital number, since it uses as much as digits as its factorization.

42242185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8448442.

The product of its digits is 5120, while the sum is 28.

The square root of 42242185 is about 6499.3988183524. The cubic root of 42242185 is about 348.2695125605.

The spelling of 42242185 in words is "forty-two million, two hundred forty-two thousand, one hundred eighty-five".