421320504 has 64 divisors (see below), whose sum is σ = 1186145280. Its totient is φ = 123552000.

The previous prime is 421320451. The next prime is 421320511. The reversal of 421320504 is 405023124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17557 + ... + 33924.

It is an arithmetic number, because the mean of its divisors is an integer number (18533520).

Almost surely, 2^421320504 is an apocalyptic number.

421320504 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

421320504 is an abundant number, since it is smaller than the sum of its proper divisors (764824776).

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

421320504 is a wasteful number, since it uses less digits than its factorization.

421320504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51532 (or 51528 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 421320504 is about 20526.0932473766. The cubic root of 421320504 is about 749.6712657105.

Adding to 421320504 its reverse (405023124), we get a palindrome (826343628).

The spelling of 421320504 in words is "four hundred twenty-one million, three hundred twenty thousand, five hundred four".