170242 has 4 divisors (see below), whose sum is σ = 255366. Its totient is φ = 85120.

The previous prime is 170239. The next prime is 170243. The reversal of 170242 is 242071.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242071 = 67 ⋅3613.

It can be written as a sum of positive squares in only one way, i.e., 108241 + 62001 = 329^2 + 249^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42559 + ... + 42562.

2¹⁷⁰²⁴² is an apocalyptic number.

170242 is a deficient number, since it is larger than the sum of its proper divisors (85124).

170242 is an equidigital number, since it uses as much as digits as its factorization.

170242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85123.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 170242 is about 412.6039263022. The cubic root of 170242 is about 55.4228563259.

The spelling of 170242 in words is "one hundred seventy thousand, two hundred forty-two", and thus it is an iban number.