421024140 has 72 divisors (see below), whose sum is σ = 1292539248. Its totient is φ = 110916480.

The previous prime is 421024129. The next prime is 421024151. The reversal of 421024140 is 41420124.

421024140 is a `hidden beast` number, since 421 + 0 + 241 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (421024129) and next prime (421024151).

It is a super-2 number, since 2×421024140² = 354522652925479200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 23 ways as a sum of consecutive naturals, for example, 850 + ... + 29030.

It is an arithmetic number, because the mean of its divisors is an integer number (17951934).

Almost surely, 2^421024140 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 421024140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (646269624).

421024140 is an abundant number, since it is smaller than the sum of its proper divisors (871515108).

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

421024140 is a wasteful number, since it uses less digits than its factorization.

421024140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28279 (or 28274 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 421024140 is about 20518.8727760567. The cubic root of 421024140 is about 749.4954473116.

Adding to 421024140 its reverse (41420124), we get a palindrome (462444264).

The spelling of 421024140 in words is "four hundred twenty-one million, twenty-four thousand, one hundred forty".