171287 has 4 divisors (see below), whose sum is σ = 172536. Its totient is φ = 170040.

The previous prime is 171271. The next prime is 171293. The reversal of 171287 is 782171.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 782171 = 13 ⋅60167.

It is a cyclic number.

It is not a de Polignac number, because 171287 - 2⁴ = 171271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 171287.

It is not an unprimeable number, because it can be changed into a prime (179287) 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, 389 + ... + 702.

It is an arithmetic number, because the mean of its divisors is an integer number (43134).

2¹⁷¹²⁸⁷ is an apocalyptic number.

171287 is a deficient number, since it is larger than the sum of its proper divisors (1249).

171287 is a wasteful number, since it uses less digits than its factorization.

171287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248.

The product of its digits is 784, while the sum is 26.

The square root of 171287 is about 413.8683365516. The cubic root of 171287 is about 55.5360261727.

The spelling of 171287 in words is "one hundred seventy-one thousand, two hundred eighty-seven".