421024560 has 160 divisors (see below), whose sum is σ = 1438836480. Its totient is φ = 100992000.

The previous prime is 421024559. The next prime is 421024589. The reversal of 421024560 is 65420124.

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 421024560.

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 31 ways as a sum of consecutive naturals, for example, 265851 + ... + 267429.

It is an arithmetic number, because the mean of its divisors is an integer number (8992728).

Almost surely, 2^421024560 is an apocalyptic number.

421024560 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 421024560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (719418240).

421024560 is an abundant number, since it is smaller than the sum of its proper divisors (1017811920).

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

421024560 is a wasteful number, since it uses less digits than its factorization.

421024560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1707 (or 1701 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 421024560 is about 20518.8830105345. The cubic root of 421024560 is about 749.4956965356.

Adding to 421024560 its reverse (65420124), we get a palindrome (486444684).

The spelling of 421024560 in words is "four hundred twenty-one million, twenty-four thousand, five hundred sixty".