421333143 has 16 divisors (see below), whose sum is σ = 700398336. Its totient is φ = 218874240.

The previous prime is 421333127. The next prime is 421333169. The reversal of 421333143 is 341333124.

It is not a de Polignac number, because 421333143 - 2⁴ = 421333127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421333103) 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 15 ways as a sum of consecutive naturals, for example, 911746 + ... + 912207.

It is an arithmetic number, because the mean of its divisors is an integer number (43774896).

Almost surely, 2^421333143 is an apocalyptic number.

421333143 is a deficient number, since it is larger than the sum of its proper divisors (279065193).

421333143 is a wasteful number, since it uses less digits than its factorization.

421333143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1823974.

The product of its digits is 2592, while the sum is 24.

The square root of 421333143 is about 20526.4011214825. The cubic root of 421333143 is about 749.6787619834.

Adding to 421333143 its reverse (341333124), we get a palindrome (762666267).

The spelling of 421333143 in words is "four hundred twenty-one million, three hundred thirty-three thousand, one hundred forty-three".