170442 has 24 divisors (see below), whose sum is σ = 391716. Its totient is φ = 53376.

The previous prime is 170441. The next prime is 170447. The reversal of 170442 is 244071.

It is a happy number.

170442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 168921 + 1521 = 411^2 + 39^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28 + ... + 584.

2¹⁷⁰⁴⁴² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 170442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195858).

170442 is an abundant number, since it is smaller than the sum of its proper divisors (221274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

170442 is a wasteful number, since it uses less digits than its factorization.

170442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582 (or 579 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 170442 is about 412.8462183429. The cubic root of 170442 is about 55.4445513901. Note that the first 3 decimals are identical.

The spelling of 170442 in words is "one hundred seventy thousand, four hundred forty-two", and thus it is an iban number.