421573684 has 48 divisors (see below), whose sum is σ = 907441920. Its totient is φ = 167247360.

The previous prime is 421573661. The next prime is 421573699. The reversal of 421573684 is 486375124.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 21777 + ... + 36295.

It is an arithmetic number, because the mean of its divisors is an integer number (18905040).

Almost surely, 2^421573684 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 421573684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (453720960).

421573684 is an abundant number, since it is smaller than the sum of its proper divisors (485868236).

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

421573684 is a wasteful number, since it uses less digits than its factorization.

421573684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14608 (or 14606 counting only the distinct ones).

The product of its digits is 161280, while the sum is 40.

The square root of 421573684 is about 20532.2595931378. The cubic root of 421573684 is about 749.8213998431.

The spelling of 421573684 in words is "four hundred twenty-one million, five hundred seventy-three thousand, six hundred eighty-four".