545771 has 4 divisors (see below), whose sum is σ = 549000. Its totient is φ = 542544.

The previous prime is 545759. The next prime is 545773. The reversal of 545771 is 177545.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 177545 = 5 ⋅35509.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-545771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (545773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1346 + ... + 1703.

It is an arithmetic number, because the mean of its divisors is an integer number (137250).

2⁵⁴⁵⁷⁷¹ is an apocalyptic number.

545771 is a deficient number, since it is larger than the sum of its proper divisors (3229).

545771 is a wasteful number, since it uses less digits than its factorization.

545771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3228.

The product of its digits is 4900, while the sum is 29.

The square root of 545771 is about 738.7631555512. The cubic root of 545771 is about 81.7215920023.

The spelling of 545771 in words is "five hundred forty-five thousand, seven hundred seventy-one".