421134240 has 192 divisors, whose sum is σ = 1421159040. Its totient is φ = 104509440.

The previous prime is 421134239. The next prime is 421134257. The reversal of 421134240 is 42431124.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 555942 + ... + 556698.

It is an arithmetic number, because the mean of its divisors is an integer number (7401870).

Almost surely, 2^421134240 is an apocalyptic number.

421134240 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 421134240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (710579520).

421134240 is an abundant number, since it is smaller than the sum of its proper divisors (1000024800).

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

421134240 is a wasteful number, since it uses less digits than its factorization.

421134240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855 (or 847 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 421134240 is about 20521.5554965992. Note that the first 3 decimals coincide. The cubic root of 421134240 is about 749.5607739353.

Adding to 421134240 its reverse (42431124), we get a palindrome (463565364).

The spelling of 421134240 in words is "four hundred twenty-one million, one hundred thirty-four thousand, two hundred forty".