421043165400 has 384 divisors, whose sum is σ = 1614134188800. Its totient is φ = 89260185600.

The previous prime is 421043165303. The next prime is 421043165401. The reversal of 421043165400 is 4561340124.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421043165401) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 1501062 + ... + 1759338.

It is an arithmetic number, because the mean of its divisors is an integer number (4203474450).

Almost surely, 2^421043165400 is an apocalyptic number.

421043165400 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 421043165400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (807067094400).

421043165400 is an abundant number, since it is smaller than the sum of its proper divisors (1193091023400).

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

421043165400 is a wasteful number, since it uses less digits than its factorization.

421043165400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258339 (or 258330 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The spelling of 421043165400 in words is "four hundred twenty-one billion, forty-three million, one hundred sixty-five thousand, four hundred".