1311127427 has 2 divisors, whose sum is σ = 1311127428. Its totient is φ = 1311127426.

The previous prime is 1311127403. The next prime is 1311127453. The reversal of 1311127427 is 7247211131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1311127427 - 2⁸ = 1311127171 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1311127427.

It is not a weakly prime, because it can be changed into another prime (1311127487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655563713 + 655563714.

It is an arithmetic number, because the mean of its divisors is an integer number (655563714).

Almost surely, 2^1311127427 is an apocalyptic number.

1311127427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311127427 is an equidigital number, since it uses as much as digits as its factorization.

1311127427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2352, while the sum is 29.

The square root of 1311127427 is about 36209.4936031975. The cubic root of 1311127427 is about 1094.4979877409.

Adding to 1311127427 its reverse (7247211131), we get a palindrome (8558338558).

The spelling of 1311127427 in words is "one billion, three hundred eleven million, one hundred twenty-seven thousand, four hundred twenty-seven".