545591 has 4 divisors (see below), whose sum is σ = 550992. Its totient is φ = 540192.

The previous prime is 545579. The next prime is 545599. The reversal of 545591 is 195545.

545591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 545591 - 2⁶ = 545527 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545599) 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, 2546 + ... + 2751.

It is an arithmetic number, because the mean of its divisors is an integer number (137748).

2⁵⁴⁵⁵⁹¹ is an apocalyptic number.

545591 is a deficient number, since it is larger than the sum of its proper divisors (5401).

545591 is a wasteful number, since it uses less digits than its factorization.

545591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5400.

The product of its digits is 4500, while the sum is 29.

The square root of 545591 is about 738.6413202631. The cubic root of 545591 is about 81.7126068516.

The spelling of 545591 in words is "five hundred forty-five thousand, five hundred ninety-one".