170543 has 4 divisors (see below), whose sum is σ = 171600. Its totient is φ = 169488.

The previous prime is 170539. The next prime is 170551. The reversal of 170543 is 345071.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 170543 - 2² = 170539 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170503) 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, 230 + ... + 627.

It is an arithmetic number, because the mean of its divisors is an integer number (42900).

2¹⁷⁰⁵⁴³ is an apocalyptic number.

170543 is a deficient number, since it is larger than the sum of its proper divisors (1057).

170543 is an equidigital number, since it uses as much as digits as its factorization.

170543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 170543 is about 412.9685218028. The cubic root of 170543 is about 55.4555009486.

The spelling of 170543 in words is "one hundred seventy thousand, five hundred forty-three".