1311241427 has 2 divisors, whose sum is σ = 1311241428. Its totient is φ = 1311241426.

The previous prime is 1311241423. The next prime is 1311241453. The reversal of 1311241427 is 7241421131.

It is an a-pointer prime, because the next prime (1311241453) can be obtained adding 1311241427 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1311241427 - 2² = 1311241423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1311241396 and 1311241405.

It is not a weakly prime, because it can be changed into another prime (1311241423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655620713 + 655620714.

It is an arithmetic number, because the mean of its divisors is an integer number (655620714).

Almost surely, 2^1311241427 is an apocalyptic number.

1311241427 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311241427 is an equidigital number, since it uses as much as digits as its factorization.

1311241427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 26.

The square root of 1311241427 is about 36211.0677417830. The cubic root of 1311241427 is about 1094.5297083176.

Adding to 1311241427 its reverse (7241421131), we get a palindrome (8552662558).

The spelling of 1311241427 in words is "one billion, three hundred eleven million, two hundred forty-one thousand, four hundred twenty-seven".