1022785 has 4 divisors (see below), whose sum is σ = 1227348. Its totient is φ = 818224.

The previous prime is 1022773. The next prime is 1022797. The reversal of 1022785 is 5872201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5872201 = 641 ⋅9161.

It is an interprime number because it is at equal distance from previous prime (1022773) and next prime (1022797).

It can be written as a sum of positive squares in 2 ways, for example, as 753424 + 269361 = 868^2 + 519^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022785 - 2¹³ = 1014593 is a prime.

It is a Duffinian 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, 102274 + ... + 102283.

It is an arithmetic number, because the mean of its divisors is an integer number (306837).

2^1022785 is an apocalyptic number.

It is an amenable number.

1022785 is a deficient number, since it is larger than the sum of its proper divisors (204563).

1022785 is an equidigital number, since it uses as much as digits as its factorization.

1022785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204562.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 1022785 is about 1011.3283344196. The cubic root of 1022785 is about 100.7538035249.

Adding to 1022785 its reverse (5872201), we get a palindrome (6894986).

The spelling of 1022785 in words is "one million, twenty-two thousand, seven hundred eighty-five".