421522004 has 48 divisors (see below), whose sum is σ = 809948160. Its totient is φ = 191086080.

The previous prime is 421521983. The next prime is 421522007. The reversal of 421522004 is 400225124.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421522007) 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, 756494 + ... + 757050.

It is an arithmetic number, because the mean of its divisors is an integer number (16873920).

Almost surely, 2^421522004 is an apocalyptic number.

It is an amenable number.

421522004 is a deficient number, since it is larger than the sum of its proper divisors (388426156).

421522004 is a wasteful number, since it uses less digits than its factorization.

421522004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968 (or 966 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 421522004 is about 20531.0010471969. The cubic root of 421522004 is about 749.7907588148.

Adding to 421522004 its reverse (400225124), we get a palindrome (821747128).

The spelling of 421522004 in words is "four hundred twenty-one million, five hundred twenty-two thousand, four".