1128285469 has 2 divisors, whose sum is σ = 1128285470. Its totient is φ = 1128285468.

The previous prime is 1128285391. The next prime is 1128285523. The reversal of 1128285469 is 9645828211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 821510244 + 306775225 = 28662^2 + 17515^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1128285469 is a prime.

It is a super-2 number, since 2×1128285469² = 2546056199113099922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1128205469) 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 as a sum of consecutive naturals, namely, 564142734 + 564142735.

It is an arithmetic number, because the mean of its divisors is an integer number (564142735).

Almost surely, 2^1128285469 is an apocalyptic number.

It is an amenable number.

1128285469 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128285469 is an equidigital number, since it uses as much as digits as its factorization.

1128285469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 46.

The square root of 1128285469 is about 33589.9608365357. The cubic root of 1128285469 is about 1041.0533795158.

The spelling of 1128285469 in words is "one billion, one hundred twenty-eight million, two hundred eighty-five thousand, four hundred sixty-nine".