545818 has 16 divisors (see below), whose sum is σ = 1008000. Its totient is φ = 215856.

The previous prime is 545791. The next prime is 545827. The reversal of 545818 is 818545.

It is an alternating number because its digits alternate between odd and even.

It is a nialpdrome in base 7.

It is a self number, because there is not a number n which added to its sum of digits gives 545818.

It is an unprimeable number.

545818 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1318 + ... + 1681.

It is an arithmetic number, because the mean of its divisors is an integer number (63000).

2⁵⁴⁵⁸¹⁸ is an apocalyptic number.

545818 is a deficient number, since it is larger than the sum of its proper divisors (462182).

545818 is a wasteful number, since it uses less digits than its factorization.

545818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3021.

The product of its digits is 6400, while the sum is 31.

The square root of 545818 is about 738.7949647906. The cubic root of 545818 is about 81.7239377997.

It can be divided in two parts, 5458 and 18, that added together give a square (5476 = 74²).

The spelling of 545818 in words is "five hundred forty-five thousand, eight hundred eighteen".