171242 has 4 divisors (see below), whose sum is σ = 256866. Its totient is φ = 85620.

The previous prime is 171233. The next prime is 171251. The reversal of 171242 is 242171.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (171233) and next prime (171251).

It can be written as a sum of positive squares in only one way, i.e., 108241 + 63001 = 329^2 + 251^2 .

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 171242.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42809 + ... + 42812.

2¹⁷¹²⁴² is an apocalyptic number.

171242 is a deficient number, since it is larger than the sum of its proper divisors (85624).

171242 is an equidigital number, since it uses as much as digits as its factorization.

171242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85623.

The product of its digits is 112, while the sum is 17.

The square root of 171242 is about 413.8139678648. The cubic root of 171242 is about 55.5311623281.

The spelling of 171242 in words is "one hundred seventy-one thousand, two hundred forty-two", and thus it is an iban number.