545544 has 24 divisors (see below), whose sum is σ = 1477710. Its totient is φ = 181824.

The previous prime is 545543. The next prime is 545549. The reversal of 545544 is 445545.

It can be written as a sum of positive squares in only one way, i.e., 544644 + 900 = 738^2 + 30^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 545544.

It is not an unprimeable number, because it can be changed into a prime (545543) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3717 + ... + 3860.

2⁵⁴⁵⁵⁴⁴ is an apocalyptic number.

It is an amenable number.

545544 is an abundant number, since it is smaller than the sum of its proper divisors (932166).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

545544 is a wasteful number, since it uses less digits than its factorization.

545544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7589 (or 7582 counting only the distinct ones).

The product of its digits is 8000, while the sum is 27.

The square root of 545544 is about 738.6095044068. The cubic root of 545544 is about 81.7102604036.

Subtracting from 545544 its reverse (445545), we obtain a palindrome (99999).

It can be divided in two parts, 545 and 544, that added together give a square (1089 = 33²).

The spelling of 545544 in words is "five hundred forty-five thousand, five hundred forty-four".