1311242365405 has 8 divisors (see below), whose sum is σ = 1798275244032. Its totient is φ = 899137621968.

The previous prime is 1311242365403. The next prime is 1311242365409. The reversal of 1311242365405 is 5045632421131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1311242365405 - 2¹ = 1311242365403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311242365403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18732033757 + ... + 18732033826.

It is an arithmetic number, because the mean of its divisors is an integer number (224784405504).

Almost surely, 2^{1311242365405} is an apocalyptic number.

It is an amenable number.

1311242365405 is a deficient number, since it is larger than the sum of its proper divisors (487032878627).

1311242365405 is an equidigital number, since it uses as much as digits as its factorization.

1311242365405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37464067595.

The product of its (nonzero) digits is 86400, while the sum is 37.

Adding to 1311242365405 its reverse (5045632421131), we get a palindrome (6356874786536).

The spelling of 1311242365405 in words is "one trillion, three hundred eleven billion, two hundred forty-two million, three hundred sixty-five thousand, four hundred five".