545445 has 48 divisors (see below), whose sum is σ = 1078272. Its totient is φ = 253440.

The previous prime is 545443. The next prime is 545449. The reversal of 545445 is 544545.

It is not a de Polignac number, because 545445 - 2¹ = 545443 is a prime.

It is a Curzon 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 (545443) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17580 + ... + 17610.

It is an arithmetic number, because the mean of its divisors is an integer number (22464).

2⁵⁴⁵⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

545445 is a deficient number, since it is larger than the sum of its proper divisors (532827).

545445 is a wasteful number, since it uses less digits than its factorization.

545445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82 (or 79 counting only the distinct ones).

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

The square root of 545445 is about 738.5424835444. The cubic root of 545445 is about 81.7053174444.

Subtracting from 545445 its reverse (544545), we obtain a square (900 = 30²).

It can be divided in two parts, 545 and 445, that added together give a triangular number (990 = T₄₄).

The spelling of 545445 in words is "five hundred forty-five thousand, four hundred forty-five".