172528 has 20 divisors (see below), whose sum is σ = 343728. Its totient is φ = 83840.

The previous prime is 172519. The next prime is 172541. The reversal of 172528 is 825271.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 525 + ... + 787.

2¹⁷²⁵²⁸ is an apocalyptic number.

172528 is the 263-rd heptagonal number.

It is an amenable number.

172528 is a deficient number, since it is larger than the sum of its proper divisors (171200).

172528 is a wasteful number, since it uses less digits than its factorization.

172528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312 (or 306 counting only the distinct ones).

The product of its digits is 1120, while the sum is 25.

The square root of 172528 is about 415.3648998170. The cubic root of 172528 is about 55.6698258373.

Adding to 172528 its reverse (825271), we get a palindrome (997799).

The spelling of 172528 in words is "one hundred seventy-two thousand, five hundred twenty-eight".