1022791 has 16 divisors (see below), whose sum is σ = 1313280. Its totient is φ = 773280.

The previous prime is 1022773. The next prime is 1022797. The reversal of 1022791 is 1972201.

It is a cyclic number.

It is not a de Polignac number, because 1022791 - 2¹¹ = 1020743 is a prime.

It is a super-2 number, since 2×1022791² = 2092202859362, which contains 22 as substring.

It is a Duffinian number.

1022791 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2670 + ... + 3028.

It is an arithmetic number, because the mean of its divisors is an integer number (82080).

2^1022791 is an apocalyptic number.

1022791 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1022791 is a deficient number, since it is larger than the sum of its proper divisors (290489).

1022791 is a wasteful number, since it uses less digits than its factorization.

1022791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 1022791 is about 1011.3313008110. The cubic root of 1022791 is about 100.7540005431.

Adding to 1022791 its reverse (1972201), we get a palindrome (2994992).

It can be divided in two parts, 10 and 22791, that added together give a square (22801 = 151²).

The spelling of 1022791 in words is "one million, twenty-two thousand, seven hundred ninety-one".