545871 has 4 divisors (see below), whose sum is σ = 727832. Its totient is φ = 363912.

The previous prime is 545863. The next prime is 545873. The reversal of 545871 is 178545.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 545871 - 2³ = 545863 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90976 + ... + 90981.

It is an arithmetic number, because the mean of its divisors is an integer number (181958).

2⁵⁴⁵⁸⁷¹ is an apocalyptic number.

545871 is a deficient number, since it is larger than the sum of its proper divisors (181961).

545871 is a wasteful number, since it uses less digits than its factorization.

545871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181960.

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

The square root of 545871 is about 738.8308331411. The cubic root of 545871 is about 81.7265828991.

The spelling of 545871 in words is "five hundred forty-five thousand, eight hundred seventy-one".