545517 has 18 divisors (see below), whose sum is σ = 917358. Its totient is φ = 311472.

The previous prime is 545497. The next prime is 545521. The reversal of 545517 is 715545.

545517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 509796 + 35721 = 714^2 + 189^2 .

It is a de Polignac number, because none of the positive numbers 2^k-545517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545527) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 178 + ... + 1059.

2⁵⁴⁵⁵¹⁷ is an apocalyptic number.

It is an amenable number.

545517 is a deficient number, since it is larger than the sum of its proper divisors (371841).

545517 is a wasteful number, since it uses less digits than its factorization.

545517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257 (or 1247 counting only the distinct ones).

The product of its digits is 3500, while the sum is 27.

The square root of 545517 is about 738.5912265929. The cubic root of 545517 is about 81.7089123831.

Subtracting from 545517 its sum of digits (27), we obtain a triangular number (545490 = T₁₀₄₄).

The spelling of 545517 in words is "five hundred forty-five thousand, five hundred seventeen".