987171 has 8 divisors (see below), whose sum is σ = 1327104. Its totient is φ = 652680.

The previous prime is 987143. The next prime is 987191. The reversal of 987171 is 171789.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 987171 - 2⁷ = 987043 is a prime.

987171 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (987101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 915 + ... + 1676.

It is an arithmetic number, because the mean of its divisors is an integer number (165888).

2⁹⁸⁷¹⁷¹ is an apocalyptic number.

987171 is a deficient number, since it is larger than the sum of its proper divisors (339933).

987171 is a wasteful number, since it uses less digits than its factorization.

987171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2721.

The product of its digits is 3528, while the sum is 33.

The square root of 987171 is about 993.5647940623. The cubic root of 987171 is about 99.5705248179.

The spelling of 987171 in words is "nine hundred eighty-seven thousand, one hundred seventy-one".