171387 has 12 divisors (see below), whose sum is σ = 251160. Its totient is φ = 112608.

The previous prime is 171383. The next prime is 171401. The reversal of 171387 is 783171.

It is not a de Polignac number, because 171387 - 2² = 171383 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 171387.

It is not an unprimeable number, because it can be changed into a prime (171383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1164 + ... + 1302.

It is an arithmetic number, because the mean of its divisors is an integer number (20930).

2¹⁷¹³⁸⁷ is an apocalyptic number.

171387 is a deficient number, since it is larger than the sum of its proper divisors (79773).

171387 is a wasteful number, since it uses less digits than its factorization.

171387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282 (or 279 counting only the distinct ones).

The product of its digits is 1176, while the sum is 27.

The square root of 171387 is about 413.9891302921. The cubic root of 171387 is about 55.5468316672.

The spelling of 171387 in words is "one hundred seventy-one thousand, three hundred eighty-seven".