421331024 has 20 divisors (see below), whose sum is σ = 844479060. Its totient is φ = 203400960.

The previous prime is 421331021. The next prime is 421331051. The reversal of 421331024 is 420133124.

It can be written as a sum of positive squares in 2 ways, for example, as 119683600 + 301647424 = 10940^2 + 17368^2 .

It is a junction number, because it is equal to n+sod(n) for n = 421330987 and 421331005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421331021) 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, 453557 + ... + 454484.

It is an arithmetic number, because the mean of its divisors is an integer number (42223953).

Almost surely, 2^421331024 is an apocalyptic number.

It is an amenable number.

421331024 is an abundant number, since it is smaller than the sum of its proper divisors (423148036).

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

421331024 is a wasteful number, since it uses less digits than its factorization.

421331024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908078 (or 908072 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 421331024 is about 20526.3495049656. The cubic root of 421331024 is about 749.6775052012.

Adding to 421331024 its reverse (420133124), we get a palindrome (841464148).

The spelling of 421331024 in words is "four hundred twenty-one million, three hundred thirty-one thousand, twenty-four".