421100400 has 120 divisors (see below), whose sum is σ = 1541659264. Its totient is φ = 96249600.

The previous prime is 421100389. The next prime is 421100413. The reversal of 421100400 is 4001124.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16666 + ... + 33465.

Almost surely, 2^421100400 is an apocalyptic number.

421100400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421100400 is an abundant number, since it is smaller than the sum of its proper divisors (1120558864).

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

421100400 is a wasteful number, since it uses less digits than its factorization.

421100400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50159 (or 50148 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 421100400 is about 20520.7309811322. The cubic root of 421100400 is about 749.5406965557.

Adding to 421100400 its reverse (4001124), we get a palindrome (425101524).

The spelling of 421100400 in words is "four hundred twenty-one million, one hundred thousand, four hundred".