421003144 has 16 divisors (see below), whose sum is σ = 789930000. Its totient is φ = 210355152.

The previous prime is 421003139. The next prime is 421003169. The reversal of 421003144 is 441300124.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5562 + ... + 29545.

It is an arithmetic number, because the mean of its divisors is an integer number (49370625).

Almost surely, 2^421003144 is an apocalyptic number.

It is an amenable number.

421003144 is a deficient number, since it is larger than the sum of its proper divisors (368926856).

421003144 is a wasteful number, since it uses less digits than its factorization.

421003144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36612 (or 36608 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 421003144 is about 20518.3611431323. The cubic root of 421003144 is about 749.4829882730.

Adding to 421003144 its reverse (441300124), we get a palindrome (862303268).

The spelling of 421003144 in words is "four hundred twenty-one million, three thousand, one hundred forty-four".