172111 has 4 divisors (see below), whose sum is σ = 173800. Its totient is φ = 170424.

The previous prime is 172097. The next prime is 172127. The reversal of 172111 is 111271.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 172111 - 2⁵ = 172079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 172091 and 172100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 681 + ... + 898.

It is an arithmetic number, because the mean of its divisors is an integer number (43450).

2¹⁷²¹¹¹ is an apocalyptic number.

172111 is a deficient number, since it is larger than the sum of its proper divisors (1689).

172111 is a wasteful number, since it uses less digits than its factorization.

172111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688.

The product of its digits is 14, while the sum is 13.

The square root of 172111 is about 414.8626278661. The cubic root of 172111 is about 55.6249383495.

Adding to 172111 its reverse (111271), we get a palindrome (283382).

The spelling of 172111 in words is "one hundred seventy-two thousand, one hundred eleven", and thus it is an iban number.