421354520 has 64 divisors (see below), whose sum is σ = 1031006880. Its totient is φ = 154331136.

The previous prime is 421354501. The next prime is 421354523. The reversal of 421354520 is 25453124.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 421354520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421354523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16787 + ... + 33533.

Almost surely, 2^421354520 is an apocalyptic number.

421354520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421354520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (515503440).

421354520 is an abundant number, since it is smaller than the sum of its proper divisors (609652360).

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

421354520 is a wasteful number, since it uses less digits than its factorization.

421354520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16812 (or 16808 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 421354520 is about 20526.9218345080. The cubic root of 421354520 is about 749.6914404795.

The spelling of 421354520 in words is "four hundred twenty-one million, three hundred fifty-four thousand, five hundred twenty".