421234123400 has 192 divisors, whose sum is σ = 1021003401600. Its totient is φ = 161427087360.

The previous prime is 421234123393. The next prime is 421234123417. The reversal of 421234123400 is 4321432124.

It is a self number, because there is not a number n which added to its sum of digits gives 421234123400.

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 47 ways as a sum of consecutive naturals, for example, 579413837 + ... + 579414563.

It is an arithmetic number, because the mean of its divisors is an integer number (5317726050).

Almost surely, 2^421234123400 is an apocalyptic number.

421234123400 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 421234123400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (510501700800).

421234123400 is an abundant number, since it is smaller than the sum of its proper divisors (599769278200).

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

421234123400 is a wasteful number, since it uses less digits than its factorization.

421234123400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408 (or 1399 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 421234123400 its reverse (4321432124), we get a palindrome (425555555524).

The spelling of 421234123400 in words is "four hundred twenty-one billion, two hundred thirty-four million, one hundred twenty-three thousand, four hundred".