545757 has 4 divisors (see below), whose sum is σ = 727680. Its totient is φ = 363836.

The previous prime is 545749. The next prime is 545759. The reversal of 545757 is 757545.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 545757 - 2³ = 545749 is a prime.

It is a D-number.

545757 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545759) 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, 90957 + ... + 90962.

It is an arithmetic number, because the mean of its divisors is an integer number (181920).

2⁵⁴⁵⁷⁵⁷ is an apocalyptic number.

It is an amenable number.

545757 is a deficient number, since it is larger than the sum of its proper divisors (181923).

545757 is a wasteful number, since it uses less digits than its factorization.

545757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181922.

The product of its digits is 24500, while the sum is 33.

The square root of 545757 is about 738.7536801939. The cubic root of 545757 is about 81.7208932281.

The spelling of 545757 in words is "five hundred forty-five thousand, seven hundred fifty-seven".