421387100 has 72 divisors (see below), whose sum is σ = 953845200. Its totient is φ = 161528640.

The previous prime is 421387091. The next prime is 421387103. The reversal of 421387100 is 1783124.

It is a self number, because there is not a number n which added to its sum of digits gives 421387100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421387103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7950674 + ... + 7950726.

It is an arithmetic number, because the mean of its divisors is an integer number (13247850).

Almost surely, 2^421387100 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 421387100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (476922600).

421387100 is an abundant number, since it is smaller than the sum of its proper divisors (532458100).

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

421387100 is an equidigital number, since it uses as much as digits as its factorization.

421387100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 421387100 is about 20527.7154111216. The cubic root of 421387100 is about 749.7107625440.

The spelling of 421387100 in words is "four hundred twenty-one million, three hundred eighty-seven thousand, one hundred".