421524460 has 72 divisors (see below), whose sum is σ = 1033058880. Its totient is φ = 144055296.

The previous prime is 421524449. The next prime is 421524479. The reversal of 421524460 is 64425124.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 453276 + ... + 454204.

It is an arithmetic number, because the mean of its divisors is an integer number (14348040).

Almost surely, 2^421524460 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 421524460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (516529440).

421524460 is an abundant number, since it is smaller than the sum of its proper divisors (611534420).

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

421524460 is a wasteful number, since it uses less digits than its factorization.

421524460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1415 (or 1406 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 421524460 is about 20531.0608590983. The cubic root of 421524460 is about 749.7922150318.

Adding to 421524460 its reverse (64425124), we get a palindrome (485949584).

The spelling of 421524460 in words is "four hundred twenty-one million, five hundred twenty-four thousand, four hundred sixty".