1028569 has 2 divisors, whose sum is σ = 1028570. Its totient is φ = 1028568.

The previous prime is 1028561. The next prime is 1028579. The reversal of 1028569 is 9658201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 931225 + 97344 = 965^2 + 312^2 .

It is a cyclic number.

It is not a de Polignac number, because 1028569 - 2³ = 1028561 is a prime.

It is a super-2 number, since 2×1028569² = 2115908375522, which contains 22 as substring.

1028569 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1028569.

It is not a weakly prime, because it can be changed into another prime (1028561) 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, 514284 + 514285.

It is an arithmetic number, because the mean of its divisors is an integer number (514285).

2^1028569 is an apocalyptic number.

It is an amenable number.

1028569 is a deficient number, since it is larger than the sum of its proper divisors (1).

1028569 is an equidigital number, since it uses as much as digits as its factorization.

1028569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 1028569 is about 1014.1839083717. The cubic root of 1028569 is about 100.9433724981.

The spelling of 1028569 in words is "one million, twenty-eight thousand, five hundred sixty-nine".