1311132541 has 2 divisors, whose sum is σ = 1311132542. Its totient is φ = 1311132540.

The previous prime is 1311132461. The next prime is 1311132583. The reversal of 1311132541 is 1452311131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1246796100 + 64336441 = 35310^2 + 8021^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311132541 - 2⁹ = 1311132029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311138541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655566270 + 655566271.

It is an arithmetic number, because the mean of its divisors is an integer number (655566271).

Almost surely, 2^1311132541 is an apocalyptic number.

It is an amenable number.

1311132541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311132541 is an equidigital number, since it uses as much as digits as its factorization.

1311132541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 22.

The square root of 1311132541 is about 36209.5642199682. The cubic root of 1311132541 is about 1094.4994107542.

Adding to 1311132541 its reverse (1452311131), we get a palindrome (2763443672).

The spelling of 1311132541 in words is "one billion, three hundred eleven million, one hundred thirty-two thousand, five hundred forty-one".