843612 has 72 divisors (see below), whose sum is σ = 2502528. Its totient is φ = 216480.

The previous prime is 843607. The next prime is 843613. The reversal of 843612 is 216348.

It is a happy number.

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 843612.

It is not an unprimeable number, because it can be changed into a prime (843613) by changing a digit.

843612 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 23 ways as a sum of consecutive naturals, for example, 10123 + ... + 10205.

2⁸⁴³⁶¹² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 843612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1251264).

843612 is an abundant number, since it is smaller than the sum of its proper divisors (1658916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

843612 is a wasteful number, since it uses less digits than its factorization.

843612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119 (or 106 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

The square root of 843612 is about 918.4835327865. The cubic root of 843612 is about 94.4889267840.

Subtracting from 843612 its reverse (216348), we obtain a square (627264 = 792²).

It can be divided in two parts, 8436 and 12, that added together give a palindrome (8448).

The spelling of 843612 in words is "eight hundred forty-three thousand, six hundred twelve".