421630 has 16 divisors (see below), whose sum is σ = 828144. Its totient is φ = 153280.

The previous prime is 421621. The next prime is 421633. The reversal of 421630 is 36124.

421630 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1807 + ... + 2026.

It is an arithmetic number, because the mean of its divisors is an integer number (51759).

2⁴²¹⁶³⁰ is an apocalyptic number.

421630 is a deficient number, since it is larger than the sum of its proper divisors (406514).

421630 is a wasteful number, since it uses less digits than its factorization.

421630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3851.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 421630 is about 649.3304243604. The cubic root of 421630 is about 74.9854786701.

Adding to 421630 its reverse (36124), we get a palindrome (457754).

The spelling of 421630 in words is "four hundred twenty-one thousand, six hundred thirty".