545289 has 4 divisors (see below), whose sum is σ = 727056. Its totient is φ = 363524.

The previous prime is 545267. The next prime is 545291. The reversal of 545289 is 982545.

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 545289 - 2⁵ = 545257 is a prime.

It is a D-number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (545239) 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, 90879 + ... + 90884.

It is an arithmetic number, because the mean of its divisors is an integer number (181764).

2⁵⁴⁵²⁸⁹ is an apocalyptic number.

It is an amenable number.

545289 is a deficient number, since it is larger than the sum of its proper divisors (181767).

545289 is a wasteful number, since it uses less digits than its factorization.

545289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181766.

The product of its digits is 14400, while the sum is 33.

The square root of 545289 is about 738.4368625685. The cubic root of 545289 is about 81.6975273251.

The spelling of 545289 in words is "five hundred forty-five thousand, two hundred eighty-nine".