171139 has 4 divisors (see below), whose sum is σ = 181224. Its totient is φ = 161056.

The previous prime is 171131. The next prime is 171161. The reversal of 171139 is 931171.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931171 = 19 ⋅49009.

It is a cyclic number.

It is not a de Polignac number, because 171139 - 2³ = 171131 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171131) 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, 5017 + ... + 5050.

It is an arithmetic number, because the mean of its divisors is an integer number (45306).

2¹⁷¹¹³⁹ is an apocalyptic number.

171139 is a deficient number, since it is larger than the sum of its proper divisors (10085).

171139 is a wasteful number, since it uses less digits than its factorization.

171139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10084.

The product of its digits is 189, while the sum is 22.

The square root of 171139 is about 413.6894970869. The cubic root of 171139 is about 55.5200263200.

It can be divided in two parts, 17 and 1139, that added together give a square (1156 = 34²).

The spelling of 171139 in words is "one hundred seventy-one thousand, one hundred thirty-nine".