421330560 has 512 divisors, whose sum is σ = 1692057600. Its totient is φ = 87048192.

The previous prime is 421330541. The next prime is 421330571. The reversal of 421330560 is 65033124.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 421330560.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8964457 + ... + 8964503.

It is an arithmetic number, because the mean of its divisors is an integer number (3304800).

Almost surely, 2^421330560 is an apocalyptic number.

421330560 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 421330560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (846028800).

421330560 is an abundant number, since it is smaller than the sum of its proper divisors (1270727040).

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

421330560 is a wasteful number, since it uses less digits than its factorization.

421330560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 421330560 is about 20526.3382024169. The cubic root of 421330560 is about 749.6772300015.

Adding to 421330560 its reverse (65033124), we get a palindrome (486363684).

The spelling of 421330560 in words is "four hundred twenty-one million, three hundred thirty thousand, five hundred sixty".