545685 has 16 divisors (see below), whose sum is σ = 998016. Its totient is φ = 249408.

The previous prime is 545663. The next prime is 545711. The reversal of 545685 is 586545.

It is not a de Polignac number, because 545685 - 2⁶ = 545621 is a prime.

It is a Curzon number.

545685 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 15 ways as a sum of consecutive naturals, for example, 2494 + ... + 2703.

It is an arithmetic number, because the mean of its divisors is an integer number (62376).

2⁵⁴⁵⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

545685 is a deficient number, since it is larger than the sum of its proper divisors (452331).

545685 is a wasteful number, since it uses less digits than its factorization.

545685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5212.

The product of its digits is 24000, while the sum is 33.

The square root of 545685 is about 738.7049478648. The cubic root of 545685 is about 81.7172993435.

The spelling of 545685 in words is "five hundred forty-five thousand, six hundred eighty-five".