505172 has 36 divisors (see below), whose sum is σ = 1031520. Its totient is φ = 215424.

The previous prime is 505159. The next prime is 505181. The reversal of 505172 is 271505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21953 + ... + 21975.

2⁵⁰⁵¹⁷² is an apocalyptic number.

It is an amenable number.

505172 is an abundant number, since it is smaller than the sum of its proper divisors (526348).

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

505172 is a wasteful number, since it uses less digits than its factorization.

505172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 350, while the sum is 20.

The square root of 505172 is about 710.7545286525. The cubic root of 505172 is about 79.6427823182.

Adding to 505172 its reverse (271505), we get a palindrome (776677).

The spelling of 505172 in words is "five hundred five thousand, one hundred seventy-two".