842216 has 8 divisors (see below), whose sum is σ = 1579170. Its totient is φ = 421104.

The previous prime is 842209. The next prime is 842249. The reversal of 842216 is 612248.

It can be written as a sum of positive squares in only one way, i.e., 722500 + 119716 = 850^2 + 346^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 842191 and 842200.

It is an unprimeable number.

842216 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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52631 + ... + 52646.

2⁸⁴²²¹⁶ is an apocalyptic number.

It is an amenable number.

842216 is a deficient number, since it is larger than the sum of its proper divisors (736954).

842216 is a wasteful number, since it uses less digits than its factorization.

842216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105283 (or 105279 counting only the distinct ones).

The product of its digits is 768, while the sum is 23.

The square root of 842216 is about 917.7232698368. The cubic root of 842216 is about 94.4367782577.

It can be divided in two parts, 8 and 42216, that added together give a palindrome (42224).

The spelling of 842216 in words is "eight hundred forty-two thousand, two hundred sixteen".