1022869 has 2 divisors, whose sum is σ = 1022870. Its totient is φ = 1022868.

The previous prime is 1022849. The next prime is 1022881. The reversal of 1022869 is 9682201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 580644 + 442225 = 762^2 + 665^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022869 - 2⁵ = 1022837 is a prime.

It is a super-2 number, since 2×1022869² = 2092521982322, which contains 22 as substring.

It is a Chen prime.

1022869 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1022849) 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 as a sum of consecutive naturals, namely, 511434 + 511435.

It is an arithmetic number, because the mean of its divisors is an integer number (511435).

2^1022869 is an apocalyptic number.

It is an amenable number.

1022869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022869 is an equidigital number, since it uses as much as digits as its factorization.

1022869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 1022869 is about 1011.3698631065. The cubic root of 1022869 is about 100.7565617090.

It can be divided in two parts, 1022 and 869, that added together give a triangular number (1891 = T₆₁).

The spelling of 1022869 in words is "one million, twenty-two thousand, eight hundred sixty-nine".