545172 has 24 divisors (see below), whose sum is σ = 1284192. Its totient is φ = 180000.

The previous prime is 545161. The next prime is 545189. The reversal of 545172 is 271545.

It is a congruent number.

It is an unprimeable number.

545172 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2047 + ... + 2297.

It is an arithmetic number, because the mean of its divisors is an integer number (53508).

2⁵⁴⁵¹⁷² is an apocalyptic number.

It is an amenable number.

545172 is an abundant number, since it is smaller than the sum of its proper divisors (739020).

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

545172 is a wasteful number, since it uses less digits than its factorization.

545172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439 (or 437 counting only the distinct ones).

The product of its digits is 1400, while the sum is 24.

The square root of 545172 is about 738.3576369213. The cubic root of 545172 is about 81.6916837606.

It can be divided in two parts, 545 and 172, that added together give a palindrome (717).

The spelling of 545172 in words is "five hundred forty-five thousand, one hundred seventy-two".