842858247 has 32 divisors (see below), whose sum is σ = 1424885760. Its totient is φ = 430420320.

The previous prime is 842858209. The next prime is 842858257. The reversal of 842858247 is 742858248.

It is not a de Polignac number, because 842858247 - 2⁷ = 842858119 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 842858196 and 842858205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842858257) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17293 + ... + 44550.

It is an arithmetic number, because the mean of its divisors is an integer number (44527680).

Almost surely, 2^842858247 is an apocalyptic number.

842858247 is a deficient number, since it is larger than the sum of its proper divisors (582027513).

842858247 is a wasteful number, since it uses less digits than its factorization.

842858247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61923.

The product of its digits is 1146880, while the sum is 48.

The square root of 842858247 is about 29032.0210629574. The cubic root of 842858247 is about 944.6077698128.

Subtracting from 842858247 its reverse (742858248), we obtain a palindrome (99999999).

The spelling of 842858247 in words is "eight hundred forty-two million, eight hundred fifty-eight thousand, two hundred forty-seven".