420170 has 8 divisors (see below), whose sum is σ = 756324. Its totient is φ = 168064.

The previous prime is 420163. The next prime is 420191. The reversal of 420170 is 71024.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 388129 + 32041 = 623^2 + 179^2 .

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

It is a Curzon number.

It is an unprimeable number.

420170 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, 20999 + ... + 21018.

2⁴²⁰¹⁷⁰ is an apocalyptic number.

420170 is a deficient number, since it is larger than the sum of its proper divisors (336154).

420170 is a wasteful number, since it uses less digits than its factorization.

420170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42024.

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

The square root of 420170 is about 648.2052144190. The cubic root of 420170 is about 74.8988265434.

Adding to 420170 its reverse (71024), we get a palindrome (491194).

The spelling of 420170 in words is "four hundred twenty thousand, one hundred seventy", and thus it is an iban number.