858421143 has 6 divisors (see below), whose sum is σ = 1239941664. Its totient is φ = 572280756.

The previous prime is 858421087. The next prime is 858421177. The reversal of 858421143 is 341124858.

It is not a de Polignac number, because 858421143 - 2⁶ = 858421079 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 858421098 and 858421107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858421243) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 47690055 + ... + 47690072.

It is an arithmetic number, because the mean of its divisors is an integer number (206656944).

Almost surely, 2^858421143 is an apocalyptic number.

858421143 is a deficient number, since it is larger than the sum of its proper divisors (381520521).

858421143 is a wasteful number, since it uses less digits than its factorization.

858421143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95380133 (or 95380130 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 858421143 is about 29298.8249423078. The cubic root of 858421143 is about 950.3862300268.

The spelling of 858421143 in words is "eight hundred fifty-eight million, four hundred twenty-one thousand, one hundred forty-three".