421810560 has 192 divisors, whose sum is σ = 1479656880. Its totient is φ = 110702592.

The previous prime is 421810559. The next prime is 421810567. The reversal of 421810560 is 65018124.

421810560 is a `hidden beast` number, since 4 + 21 + 81 + 0 + 560 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421810567) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 385374 + ... + 386466.

Almost surely, 2^421810560 is an apocalyptic number.

421810560 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 421810560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (739828440).

421810560 is an abundant number, since it is smaller than the sum of its proper divisors (1057846320).

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

421810560 is a wasteful number, since it uses less digits than its factorization.

421810560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185 (or 1170 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 421810560 is about 20538.0271691319. The cubic root of 421810560 is about 749.9618113889.

Adding to 421810560 its reverse (65018124), we get a palindrome (486828684).

The spelling of 421810560 in words is "four hundred twenty-one million, eight hundred ten thousand, five hundred sixty".