420406 has 8 divisors (see below), whose sum is σ = 720720. Its totient is φ = 180168.

The previous prime is 420397. The next prime is 420419. The reversal of 420406 is 604024.

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

It is a self number, because there is not a number n which added to its sum of digits gives 420406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15001 + ... + 15028.

It is an arithmetic number, because the mean of its divisors is an integer number (90090).

2⁴²⁰⁴⁰⁶ is an apocalyptic number.

420406 is a deficient number, since it is larger than the sum of its proper divisors (300314).

420406 is a wasteful number, since it uses less digits than its factorization.

420406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30038.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 420406 is about 648.3872299791. The cubic root of 420406 is about 74.9128469119.

The spelling of 420406 in words is "four hundred twenty thousand, four hundred six".