421331020 has 48 divisors (see below), whose sum is σ = 1007209728. Its totient is φ = 146548160.

The previous prime is 421330999. The next prime is 421331021. The reversal of 421331020 is 20133124.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 421330985 and 421331003.

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 15 ways as a sum of consecutive naturals, for example, 36574 + ... + 46693.

It is an arithmetic number, because the mean of its divisors is an integer number (20983536).

Almost surely, 2^421331020 is an apocalyptic number.

It is an amenable number.

421331020 is an abundant number, since it is smaller than the sum of its proper divisors (585878708).

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

421331020 is a wasteful number, since it uses less digits than its factorization.

421331020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83310 (or 83308 counting only the distinct ones).

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

The square root of 421331020 is about 20526.3494075298. The cubic root of 421331020 is about 749.6775028288.

Adding to 421331020 its reverse (20133124), we get a palindrome (441464144).

The spelling of 421331020 in words is "four hundred twenty-one million, three hundred thirty-one thousand, twenty".