420217 has 8 divisors (see below), whose sum is σ = 484416. Its totient is φ = 357072.

The previous prime is 420193. The next prime is 420221. The reversal of 420217 is 712024.

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

It is not a de Polignac number, because 420217 - 2¹¹ = 418169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 420217.

It is not an unprimeable number, because it can be changed into a prime (420317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1038 + ... + 1384.

It is an arithmetic number, because the mean of its divisors is an integer number (60552).

2⁴²⁰²¹⁷ is an apocalyptic number.

It is an amenable number.

420217 is a deficient number, since it is larger than the sum of its proper divisors (64199).

420217 is a wasteful number, since it uses less digits than its factorization.

420217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 420217 is about 648.2414673561. The cubic root of 420217 is about 74.9016191540.

The spelling of 420217 in words is "four hundred twenty thousand, two hundred seventeen", and thus it is an iban number.