420017 has 4 divisors (see below), whose sum is σ = 452340. Its totient is φ = 387696.

The previous prime is 420001. The next prime is 420029. The reversal of 420017 is 710024.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 234256 + 185761 = 484^2 + 431^2 .

It is a cyclic number.

It is not a de Polignac number, because 420017 - 2⁴ = 420001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 419983 and 420010.

It is not an unprimeable number, because it can be changed into a prime (420037) 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, 16142 + ... + 16167.

It is an arithmetic number, because the mean of its divisors is an integer number (113085).

2⁴²⁰⁰¹⁷ is an apocalyptic number.

It is an amenable number.

420017 is a deficient number, since it is larger than the sum of its proper divisors (32323).

420017 is a wasteful number, since it uses less digits than its factorization.

420017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32322.

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

The square root of 420017 is about 648.0871854928. The cubic root of 420017 is about 74.8897342620.

The spelling of 420017 in words is "four hundred twenty thousand, seventeen", and thus it is an iban number.