545686 has 8 divisors (see below), whose sum is σ = 822744. Its totient is φ = 271440.

The previous prime is 545663. The next prime is 545711. The reversal of 545686 is 686545.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

545686 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120 + ... + 1051.

It is an arithmetic number, because the mean of its divisors is an integer number (102843).

2⁵⁴⁵⁶⁸⁶ is an apocalyptic number.

545686 is a deficient number, since it is larger than the sum of its proper divisors (277058).

545686 is a wasteful number, since it uses less digits than its factorization.

545686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406.

The product of its digits is 28800, while the sum is 34.

The square root of 545686 is about 738.7056247248. The cubic root of 545686 is about 81.7173492607.

The spelling of 545686 in words is "five hundred forty-five thousand, six hundred eighty-six".