545287 has 4 divisors (see below), whose sum is σ = 564120. Its totient is φ = 526456.

The previous prime is 545267. The next prime is 545291. The reversal of 545287 is 782545.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-545287 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

545287 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545257) 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 3 ways as a sum of consecutive naturals, for example, 9373 + ... + 9430.

It is an arithmetic number, because the mean of its divisors is an integer number (141030).

2⁵⁴⁵²⁸⁷ is an apocalyptic number.

545287 is a deficient number, since it is larger than the sum of its proper divisors (18833).

545287 is a wasteful number, since it uses less digits than its factorization.

545287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18832.

The product of its digits is 11200, while the sum is 31.

The square root of 545287 is about 738.4355083553. The cubic root of 545287 is about 81.6974274421.

The spelling of 545287 in words is "five hundred forty-five thousand, two hundred eighty-seven".