421022504 has 48 divisors (see below), whose sum is σ = 924285780. Its totient is φ = 179262720.

The previous prime is 421022461. The next prime is 421022557. The reversal of 421022504 is 405220124.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 420660100 + 362404 = 20510^2 + 602^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58124 + ... + 64964.

Almost surely, 2^421022504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421022504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (462142890).

421022504 is an abundant number, since it is smaller than the sum of its proper divisors (503263276).

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

421022504 is a wasteful number, since it uses less digits than its factorization.

421022504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7018 (or 7007 counting only the distinct ones).

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

The square root of 421022504 is about 20518.8329102803. The cubic root of 421022504 is about 749.4944765231.

Adding to 421022504 its reverse (405220124), we get a palindrome (826242628).

The spelling of 421022504 in words is "four hundred twenty-one million, twenty-two thousand, five hundred four".