421000002 has 24 divisors (see below), whose sum is σ = 965824236. Its totient is φ = 132078336.

The previous prime is 421000001. The next prime is 421000031. The reversal of 421000002 is 200000124.

It can be written as a sum of positive squares in 2 ways, for example, as 379899081 + 41100921 = 19491^2 + 6411^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (421000001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 687603 + ... + 688214.

Almost surely, 2^421000002 is an apocalyptic number.

421000002 is an abundant number, since it is smaller than the sum of its proper divisors (544824234).

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

421000002 is a wasteful number, since it uses less digits than its factorization.

421000002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375842 (or 1375839 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 421000002 is about 20518.2845774202. The cubic root of 421000002 is about 749.4811237727.

Adding to 421000002 its reverse (200000124), we get a palindrome (621000126).

The spelling of 421000002 in words is "four hundred twenty-one million, two", and thus it is an aban number.