844225 has 6 divisors (see below), whose sum is σ = 1046870. Its totient is φ = 675360.

The previous prime is 844201. The next prime is 844243. The reversal of 844225 is 522448.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 153664 + 690561 = 392^2 + 831^2 .

It is not a de Polignac number, because 844225 - 2¹⁵ = 811457 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 33769 = 844225 / (8 + 4 + 4 + 2 + 2 + 5).

844225 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 844225.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16860 + ... + 16909.

2⁸⁴⁴²²⁵ is an apocalyptic number.

It is an amenable number.

844225 is a deficient number, since it is larger than the sum of its proper divisors (202645).

844225 is a wasteful number, since it uses less digits than its factorization.

844225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33779 (or 33774 counting only the distinct ones).

The product of its digits is 2560, while the sum is 25.

The square root of 844225 is about 918.8171744150. The cubic root of 844225 is about 94.5118076378.

The spelling of 844225 in words is "eight hundred forty-four thousand, two hundred twenty-five".