45685 has 4 divisors (see below), whose sum is σ = 54828. Its totient is φ = 36544.

The previous prime is 45677. The next prime is 45691. The reversal of 45685 is 58654.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58654 = 2 ⋅29327.

It can be written as a sum of positive squares in 2 ways, for example, as 6084 + 39601 = 78^2 + 199^2 .

It is a cyclic number.

It is not a de Polignac number, because 45685 - 2³ = 45677 is a prime.

It is a Duffinian number.

45685 is a lucky 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, 4564 + ... + 4573.

It is an arithmetic number, because the mean of its divisors is an integer number (13707).

2⁴⁵⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

45685 is a deficient number, since it is larger than the sum of its proper divisors (9143).

45685 is an equidigital number, since it uses as much as digits as its factorization.

45685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9142.

The product of its digits is 4800, while the sum is 28.

The square root of 45685 is about 213.7404968648. The cubic root of 45685 is about 35.7485043468.

The spelling of 45685 in words is "forty-five thousand, six hundred eighty-five".