421224020 has 24 divisors (see below), whose sum is σ = 1010937984. Its totient is φ = 144419616.

The previous prime is 421224017. The next prime is 421224061. The reversal of 421224020 is 20422124.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 421224020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1504232 + ... + 1504511.

It is an arithmetic number, because the mean of its divisors is an integer number (42122416).

Almost surely, 2^421224020 is an apocalyptic number.

It is an amenable number.

421224020 is an abundant number, since it is smaller than the sum of its proper divisors (589713964).

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

421224020 is a wasteful number, since it uses less digits than its factorization.

421224020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3008759 (or 3008757 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 421224020 is about 20523.7428360424. The cubic root of 421224020 is about 749.6140354833.

Adding to 421224020 its reverse (20422124), we get a palindrome (441646144).

The spelling of 421224020 in words is "four hundred twenty-one million, two hundred twenty-four thousand, twenty".