180685 has 4 divisors (see below), whose sum is σ = 216828. Its totient is φ = 144544.

The previous prime is 180679. The next prime is 180701. The reversal of 180685 is 586081.

It is a happy number.

180685 is nontrivially palindromic in base 7.

180685 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, and also an emirpimes, since its reverse is a distinct semiprime: 586081 = 157 ⋅3733.

It can be written as a sum of positive squares in 2 ways, for example, as 86436 + 94249 = 294^2 + 307^2 .

It is a cyclic number.

It is not a de Polignac number, because 180685 - 2¹⁷ = 49613 is a prime.

It is a Duffinian number.

It is a congruent 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, 18064 + ... + 18073.

It is an arithmetic number, because the mean of its divisors is an integer number (54207).

2¹⁸⁰⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

180685 is a deficient number, since it is larger than the sum of its proper divisors (36143).

180685 is an equidigital number, since it uses as much as digits as its factorization.

180685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36142.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 180685 is about 425.0705823743. The cubic root of 180685 is about 56.5336943667.

It can be divided in two parts, 1806 and 85, that added together give a triangular number (1891 = T₆₁).

The spelling of 180685 in words is "one hundred eighty thousand, six hundred eighty-five".