421022140 has 96 divisors (see below), whose sum is σ = 1160409600. Its totient is φ = 124312320.

The previous prime is 421022137. The next prime is 421022179. The reversal of 421022140 is 41220124.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22066 + ... + 36454.

It is an arithmetic number, because the mean of its divisors is an integer number (12087600).

Almost surely, 2^421022140 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 421022140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (580204800).

421022140 is an abundant number, since it is smaller than the sum of its proper divisors (739387460).

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

421022140 is a wasteful number, since it uses less digits than its factorization.

421022140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14435 (or 14433 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 421022140 is about 20518.8240403781. The cubic root of 421022140 is about 749.4942605283.

Adding to 421022140 its reverse (41220124), we get a palindrome (462242264).

The spelling of 421022140 in words is "four hundred twenty-one million, twenty-two thousand, one hundred forty".