171543 has 8 divisors (see below), whose sum is σ = 230656. Its totient is φ = 113400.

The previous prime is 171541. The next prime is 171553. The reversal of 171543 is 345171.

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

It is not a de Polignac number, because 171543 - 2¹ = 171541 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171541) 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, 498 + ... + 768.

It is an arithmetic number, because the mean of its divisors is an integer number (28832).

2¹⁷¹⁵⁴³ is an apocalyptic number.

171543 is a deficient number, since it is larger than the sum of its proper divisors (59113).

171543 is a wasteful number, since it uses less digits than its factorization.

171543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485.

The product of its digits is 420, while the sum is 21.

The square root of 171543 is about 414.1774981816. The cubic root of 171543 is about 55.5636798489.

The spelling of 171543 in words is "one hundred seventy-one thousand, five hundred forty-three".