420630 has 32 divisors (see below), whose sum is σ = 1154304. Its totient is φ = 96096.

The previous prime is 420613. The next prime is 420671. The reversal of 420630 is 36024.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an Ulam number.

420630 is a modest number, since divided by 630 gives 420 as remainder.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 420630.

It is an unprimeable number.

420630 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 15 ways as a sum of consecutive naturals, for example, 792 + ... + 1211.

It is an arithmetic number, because the mean of its divisors is an integer number (36072).

2⁴²⁰⁶³⁰ is an apocalyptic number.

420630 is an abundant number, since it is smaller than the sum of its proper divisors (733674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

420630 is a wasteful number, since it uses less digits than its factorization.

420630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 420630 is about 648.5599432589. The cubic root of 420630 is about 74.9261495275.

Adding to 420630 its reverse (36024), we get a palindrome (456654).

The spelling of 420630 in words is "four hundred twenty thousand, six hundred thirty".