421420424 has 16 divisors (see below), whose sum is σ = 806976000. Its totient is φ = 206226832.

The previous prime is 421420423. The next prime is 421420451. The reversal of 421420424 is 424024124.

It is a self number, because there is not a number n which added to its sum of digits gives 421420424.

It is not an unprimeable number, because it can be changed into a prime (421420423) 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, 560024 + ... + 560775.

It is an arithmetic number, because the mean of its divisors is an integer number (50436000).

Almost surely, 2^421420424 is an apocalyptic number.

It is an amenable number.

421420424 is a deficient number, since it is larger than the sum of its proper divisors (385555576).

421420424 is a wasteful number, since it uses less digits than its factorization.

421420424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120852 (or 1120848 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 23.

The square root of 421420424 is about 20528.5270781905. The cubic root of 421420424 is about 749.7305248187.

Adding to 421420424 its reverse (424024124), we get a palindrome (845444548).

The spelling of 421420424 in words is "four hundred twenty-one million, four hundred twenty thousand, four hundred twenty-four".