1311130241 has 4 divisors (see below), whose sum is σ = 1311203412. Its totient is φ = 1311057072.

The previous prime is 1311130237. The next prime is 1311130259. The reversal of 1311130241 is 1420311131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1420311131 = 1097 ⋅1294723.

It can be written as a sum of positive squares in 2 ways, for example, as 534950641 + 776179600 = 23129^2 + 27860^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311130241 - 2² = 1311130237 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311130201) 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 in 3 ways as a sum of consecutive naturals, for example, 10451 + ... + 52263.

It is an arithmetic number, because the mean of its divisors is an integer number (327800853).

Almost surely, 2^1311130241 is an apocalyptic number.

It is an amenable number.

1311130241 is a deficient number, since it is larger than the sum of its proper divisors (73171).

1311130241 is an equidigital number, since it uses as much as digits as its factorization.

1311130241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73170.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1311130241 is about 36209.5324603895. The cubic root of 1311130241 is about 1094.4987707604.

Adding to 1311130241 its reverse (1420311131), we get a palindrome (2731441372).

The spelling of 1311130241 in words is "one billion, three hundred eleven million, one hundred thirty thousand, two hundred forty-one".