172117 has 4 divisors (see below), whose sum is σ = 187776. Its totient is φ = 156460.

The previous prime is 172097. The next prime is 172127. The reversal of 172117 is 711271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 711271 = 11 ⋅64661.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172117 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 172094 and 172103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172127) by changing a digit.

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, 7813 + ... + 7834.

It is an arithmetic number, because the mean of its divisors is an integer number (46944).

2¹⁷²¹¹⁷ is an apocalyptic number.

It is an amenable number.

172117 is a deficient number, since it is larger than the sum of its proper divisors (15659).

172117 is a wasteful number, since it uses less digits than its factorization.

172117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15658.

The product of its digits is 98, while the sum is 19.

The square root of 172117 is about 414.8698591125. The cubic root of 172117 is about 55.6255847264.

Adding to 172117 its reverse (711271), we get a palindrome (883388).

It can be divided in two parts, 172 and 117, that added together give a square (289 = 17²).

The spelling of 172117 in words is "one hundred seventy-two thousand, one hundred seventeen", and thus it is an iban number.