421671143 has 4 divisors (see below), whose sum is σ = 422010000. Its totient is φ = 421332288.

The previous prime is 421671137. The next prime is 421671163. The reversal of 421671143 is 341176124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421671143 - 2⁶ = 421671079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421671113) 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 3 ways as a sum of consecutive naturals, for example, 167555 + ... + 170052.

It is an arithmetic number, because the mean of its divisors is an integer number (105502500).

Almost surely, 2^421671143 is an apocalyptic number.

421671143 is a deficient number, since it is larger than the sum of its proper divisors (338857).

421671143 is a wasteful number, since it uses less digits than its factorization.

421671143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338856.

The product of its digits is 4032, while the sum is 29.

The square root of 421671143 is about 20534.6327700302. The cubic root of 421671143 is about 749.8791763884.

The spelling of 421671143 in words is "four hundred twenty-one million, six hundred seventy-one thousand, one hundred forty-three".