42731185 has 12 divisors (see below), whose sum is σ = 59649588. Its totient is φ = 29301216.

The previous prime is 42731177. The next prime is 42731201. The reversal of 42731185 is 58113724.

It can be written as a sum of positive squares in 2 ways, for example, as 28601104 + 14130081 = 5348^2 + 3759^2 .

It is not a de Polignac number, because 42731185 - 2³ = 42731177 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86962 + ... + 87451.

It is an arithmetic number, because the mean of its divisors is an integer number (4970799).

Almost surely, 2^42731185 is an apocalyptic number.

It is an amenable number.

42731185 is a deficient number, since it is larger than the sum of its proper divisors (16918403).

42731185 is a wasteful number, since it uses less digits than its factorization.

42731185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174432 (or 174425 counting only the distinct ones).

The product of its digits is 6720, while the sum is 31.

The square root of 42731185 is about 6536.9094379531. The cubic root of 42731185 is about 349.6082283015.

The spelling of 42731185 in words is "forty-two million, seven hundred thirty-one thousand, one hundred eighty-five".