421003143 has 32 divisors (see below), whose sum is σ = 690597120. Its totient is φ = 251333280.

The previous prime is 421003139. The next prime is 421003169. The reversal of 421003143 is 341300124.

It is not a de Polignac number, because 421003143 - 2² = 421003139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421003123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9321 + ... + 30477.

It is an arithmetic number, because the mean of its divisors is an integer number (21581160).

Almost surely, 2^421003143 is an apocalyptic number.

421003143 is a deficient number, since it is larger than the sum of its proper divisors (269593977).

421003143 is a wasteful number, since it uses less digits than its factorization.

421003143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21244 (or 21238 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 421003143 is about 20518.3611187638. The cubic root of 421003143 is about 749.4829876796.

Adding to 421003143 its reverse (341300124), we get a palindrome (762303267).

The spelling of 421003143 in words is "four hundred twenty-one million, three thousand, one hundred forty-three".