170842 has 8 divisors (see below), whose sum is σ = 292896. Its totient is φ = 73212.

The previous prime is 170837. The next prime is 170843. The reversal of 170842 is 248071.

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

It is not an unprimeable number, because it can be changed into a prime (170843) by changing a digit.

170842 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6088 + ... + 6115.

It is an arithmetic number, because the mean of its divisors is an integer number (36612).

2¹⁷⁰⁸⁴² is an apocalyptic number.

170842 is a deficient number, since it is larger than the sum of its proper divisors (122054).

170842 is a wasteful number, since it uses less digits than its factorization.

170842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12212.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 170842 is about 413.3303763335. The cubic root of 170842 is about 55.4878906568.

Subtracting from 170842 its sum of digits (22), we obtain a triangular number (170820 = T₅₈₄).

The spelling of 170842 in words is "one hundred seventy thousand, eight hundred forty-two".