822745 has 16 divisors (see below), whose sum is σ = 1231488. Its totient is φ = 512640.

The previous prime is 822743. The next prime is 822761. The reversal of 822745 is 547228.

It is not a de Polignac number, because 822745 - 2¹ = 822743 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (822743) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 684 + ... + 1453.

It is an arithmetic number, because the mean of its divisors is an integer number (76968).

2⁸²²⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

822745 is a deficient number, since it is larger than the sum of its proper divisors (408743).

822745 is a wasteful number, since it uses less digits than its factorization.

822745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160.

The product of its digits is 4480, while the sum is 28.

The square root of 822745 is about 907.0529201761. The cubic root of 822745 is about 93.7033427095.

The spelling of 822745 in words is "eight hundred twenty-two thousand, seven hundred forty-five".