421234140 has 96 divisors (see below), whose sum is σ = 1201806144. Its totient is φ = 110223360.

The previous prime is 421234127. The next prime is 421234157. The reversal of 421234140 is 41432124.

It is a congruent number.

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, 913510 + ... + 913970.

It is an arithmetic number, because the mean of its divisors is an integer number (12518814).

Almost surely, 2^421234140 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 421234140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (600903072).

421234140 is an abundant number, since it is smaller than the sum of its proper divisors (780572004).

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

421234140 is a wasteful number, since it uses less digits than its factorization.

421234140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727 (or 725 counting only the distinct ones).

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

The square root of 421234140 is about 20523.9893782861. The cubic root of 421234140 is about 749.6200386494.

Adding to 421234140 its reverse (41432124), we get a palindrome (462666264).

The spelling of 421234140 in words is "four hundred twenty-one million, two hundred thirty-four thousand, one hundred forty".