42170 has 8 divisors (see below), whose sum is σ = 75924. Its totient is φ = 16864.

The previous prime is 42169. The next prime is 42179. The reversal of 42170 is 7124.

It is a happy number.

42170 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 41209 + 961 = 203^2 + 31^2 .

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

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (42179) 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, 2099 + ... + 2118.

2⁴²¹⁷⁰ is an apocalyptic number.

42170 is a deficient number, since it is larger than the sum of its proper divisors (33754).

42170 is a wasteful number, since it uses less digits than its factorization.

42170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4224.

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 42170 is about 205.3533540023. The cubic root of 42170 is about 34.8071020868.

Adding to 42170 its reverse (7124), we get a palindrome (49294).

It can be divided in two parts, 42 and 170, that multiplied together give a triangular number (7140 = T₁₁₉).

The spelling of 42170 in words is "forty-two thousand, one hundred seventy", and thus it is an iban number.