1128631571 has 2 divisors, whose sum is σ = 1128631572. Its totient is φ = 1128631570.

The previous prime is 1128631561. The next prime is 1128631627. The reversal of 1128631571 is 1751368211.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1128631571 is a prime.

It is not a weakly prime, because it can be changed into another prime (1128631561) 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, 564315785 + 564315786.

It is an arithmetic number, because the mean of its divisors is an integer number (564315786).

Almost surely, 2^1128631571 is an apocalyptic number.

1128631571 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128631571 is an equidigital number, since it uses as much as digits as its factorization.

1128631571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 35.

The square root of 1128631571 is about 33595.1123081915. The cubic root of 1128631571 is about 1041.1598164744.

Adding to 1128631571 its reverse (1751368211), we get a palindrome (2879999782).

The spelling of 1128631571 in words is "one billion, one hundred twenty-eight million, six hundred thirty-one thousand, five hundred seventy-one".