545817 has 8 divisors (see below), whose sum is σ = 751360. Its totient is φ = 352080.

The previous prime is 545791. The next prime is 545827. The reversal of 545817 is 718545.

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

It is not a de Polignac number, because 545817 - 2¹⁰ = 544793 is a prime.

It is a Duffinian number.

545817 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (545827) by changing a digit.

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, 2842 + ... + 3027.

It is an arithmetic number, because the mean of its divisors is an integer number (93920).

2⁵⁴⁵⁸¹⁷ is an apocalyptic number.

It is an amenable number.

545817 is a deficient number, since it is larger than the sum of its proper divisors (205543).

545817 is a wasteful number, since it uses less digits than its factorization.

545817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5903.

The product of its digits is 5600, while the sum is 30.

The square root of 545817 is about 738.7942880126. The cubic root of 545817 is about 81.7238878905.

The spelling of 545817 in words is "five hundred forty-five thousand, eight hundred seventeen".