40085 has 4 divisors (see below), whose sum is σ = 48108. Its totient is φ = 32064.

The previous prime is 40063. The next prime is 40087. The reversal of 40085 is 58004.

40085 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 18769 + 21316 = 137^2 + 146^2 .

It is a cyclic number.

It is not a de Polignac number, because 40085 - 2⁸ = 39829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40087) 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, 4004 + ... + 4013.

It is an arithmetic number, because the mean of its divisors is an integer number (12027).

2⁴⁰⁰⁸⁵ is an apocalyptic number.

It is an amenable number.

40085 is a deficient number, since it is larger than the sum of its proper divisors (8023).

40085 is an equidigital number, since it uses as much as digits as its factorization.

40085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8022.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 40085 is about 200.2123872292. The cubic root of 40085 is about 34.2237264539.

Adding to 40085 its reverse (58004), we get a palindrome (98089).

The spelling of 40085 in words is "forty thousand, eighty-five".