172118 has 8 divisors (see below), whose sum is σ = 264600. Its totient is φ = 83920.

The previous prime is 172097. The next prime is 172127. The reversal of 172118 is 811271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 172118.

It is a congruent number.

It is an unprimeable 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 3 ways as a sum of consecutive naturals, for example, 968 + ... + 1131.

It is an arithmetic number, because the mean of its divisors is an integer number (33075).

2¹⁷²¹¹⁸ is an apocalyptic number.

172118 is a deficient number, since it is larger than the sum of its proper divisors (92482).

172118 is a wasteful number, since it uses less digits than its factorization.

172118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2142.

The product of its digits is 112, while the sum is 20.

The square root of 172118 is about 414.8710643079. The cubic root of 172118 is about 55.6256924545.

Adding to 172118 its reverse (811271), we get a palindrome (983389).

The spelling of 172118 in words is "one hundred seventy-two thousand, one hundred eighteen".