171187 has 4 divisors (see below), whose sum is σ = 177120. Its totient is φ = 165256.

The previous prime is 171179. The next prime is 171203. The reversal of 171187 is 781171.

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 171187 - 2³ = 171179 is a prime.

It is a Duffinian number.

171187 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (171167) 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, 2923 + ... + 2980.

It is an arithmetic number, because the mean of its divisors is an integer number (44280).

2¹⁷¹¹⁸⁷ is an apocalyptic number.

171187 is a deficient number, since it is larger than the sum of its proper divisors (5933).

171187 is an equidigital number, since it uses as much as digits as its factorization.

171187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5932.

The product of its digits is 392, while the sum is 25.

The square root of 171187 is about 413.7475075454. The cubic root of 171187 is about 55.5252164718.

The spelling of 171187 in words is "one hundred seventy-one thousand, one hundred eighty-seven".