42185 has 16 divisors (see below), whose sum is σ = 60480. Its totient is φ = 27840.

The previous prime is 42181. The next prime is 42187. The reversal of 42185 is 58124.

It is not a de Polignac number, because 42185 - 2² = 42181 is a prime.

It is a nialpdrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 42185.

It is not an unprimeable number, because it can be changed into a prime (42181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 686 + ... + 744.

It is an arithmetic number, because the mean of its divisors is an integer number (3780).

2⁴²¹⁸⁵ is an apocalyptic number.

It is an amenable number.

42185 is a deficient number, since it is larger than the sum of its proper divisors (18295).

42185 is a wasteful number, since it uses less digits than its factorization.

42185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88.

The product of its digits is 320, while the sum is 20.

The square root of 42185 is about 205.3898731681. The cubic root of 42185 is about 34.8112285957.

The spelling of 42185 in words is "forty-two thousand, one hundred eighty-five".