822245 has 4 divisors (see below), whose sum is σ = 986700. Its totient is φ = 657792.

The previous prime is 822233. The next prime is 822253. The reversal of 822245 is 542228.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 470596 + 351649 = 686^2 + 593^2 .

It is a cyclic number.

It is not a de Polignac number, because 822245 - 2⁴ = 822229 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 822245.

It is a congruent number.

It is an unprimeable 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 in 3 ways as a sum of consecutive naturals, for example, 82220 + ... + 82229.

It is an arithmetic number, because the mean of its divisors is an integer number (246675).

2⁸²²²⁴⁵ is an apocalyptic number.

It is an amenable number.

822245 is a deficient number, since it is larger than the sum of its proper divisors (164455).

822245 is a wasteful number, since it uses less digits than its factorization.

822245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164454.

The product of its digits is 1280, while the sum is 23.

The square root of 822245 is about 906.7772604118. Note that the first 3 decimals coincide. The cubic root of 822245 is about 93.6843570110.

The spelling of 822245 in words is "eight hundred twenty-two thousand, two hundred forty-five".