111717 has 6 divisors (see below), whose sum is σ = 161382. Its totient is φ = 74472.

The previous prime is 111697. The next prime is 111721. The reversal of 111717 is 717111.

Added to its reverse (717111) it gives a triangular number (828828 = T₁₂₈₇).

It can be written as a sum of positive squares in only one way, i.e., 86436 + 25281 = 294^2 + 159^2 .

It is not a de Polignac number, because 111717 - 2⁶ = 111653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111767) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6198 + ... + 6215.

It is an arithmetic number, because the mean of its divisors is an integer number (26897).

2¹¹¹⁷¹⁷ is an apocalyptic number.

It is an amenable number.

111717 is a deficient number, since it is larger than the sum of its proper divisors (49665).

111717 is a wasteful number, since it uses less digits than its factorization.

111717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12419 (or 12416 counting only the distinct ones).

The product of its digits is 49, while the sum is 18.

The square root of 111717 is about 334.2409310662. The cubic root of 111717 is about 48.1622116198.

Adding to 111717 its reverse (717111), we get a palindrome (828828).

It can be divided in two parts, 111 and 717, that added together give a palindrome (828).

The spelling of 111717 in words is "one hundred eleven thousand, seven hundred seventeen", and thus it is an iban number.