172730 has 16 divisors (see below), whose sum is σ = 324864. Its totient is φ = 66000.

The previous prime is 172721. The next prime is 172741. The reversal of 172730 is 37271.

172730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146 + ... + 605.

It is an arithmetic number, because the mean of its divisors is an integer number (20304).

2¹⁷²⁷³⁰ is an apocalyptic number.

172730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

172730 is a deficient number, since it is larger than the sum of its proper divisors (152134).

172730 is a wasteful number, since it uses less digits than its factorization.

172730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781.

The product of its (nonzero) digits is 294, while the sum is 20.

The square root of 172730 is about 415.6079883737. The cubic root of 172730 is about 55.6915438945.

The spelling of 172730 in words is "one hundred seventy-two thousand, seven hundred thirty".