1311311 has 2 divisors, whose sum is σ = 1311312. Its totient is φ = 1311310.

The previous prime is 1311307. The next prime is 1311341. The reversal of 1311311 is 1131131.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1131131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1311311 - 2² = 1311307 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1311292 and 1311301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655655 + 655656.

It is an arithmetic number, because the mean of its divisors is an integer number (655656).

2^1311311 is an apocalyptic number.

1311311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311311 is an equidigital number, since it uses as much as digits as its factorization.

1311311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9, while the sum is 11.

The square root of 1311311 is about 1145.1248840192. The cubic root of 1311311 is about 109.4549066148.

Adding to 1311311 its reverse (1131131), we get a palindrome (2442442).

The spelling of 1311311 in words is "one million, three hundred eleven thousand, three hundred eleven".