842247 has 24 divisors (see below), whose sum is σ = 1441440. Its totient is φ = 463680.

The previous prime is 842209. The next prime is 842249. The reversal of 842247 is 742248.

842247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 842247 - 2⁶ = 842183 is a prime.

It is a d-powerful number, because it can be written as 8 + 4⁴ + 2³ + 2¹¹ + 4⁷ + 7⁷ .

It is a self number, because there is not a number n which added to its sum of digits gives 842247.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 842247.

It is not an unprimeable number, because it can be changed into a prime (842249) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1597 + ... + 2057.

It is an arithmetic number, because the mean of its divisors is an integer number (60060).

2⁸⁴²²⁴⁷ is an apocalyptic number.

842247 is a gapful number since it is divisible by the number (87) formed by its first and last digit.

842247 is a deficient number, since it is larger than the sum of its proper divisors (599193).

842247 is a wasteful number, since it uses less digits than its factorization.

842247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503 (or 500 counting only the distinct ones).

The product of its digits is 3584, while the sum is 27.

The square root of 842247 is about 917.7401593044. The cubic root of 842247 is about 94.4379369090.

Subtracting from 842247 its reverse (742248), we obtain a palindrome (99999).

It can be divided in two parts, 842 and 247, that added together give a square (1089 = 33²).

The spelling of 842247 in words is "eight hundred forty-two thousand, two hundred forty-seven".