1311325135 has 4 divisors (see below), whose sum is σ = 1573590168. Its totient is φ = 1049060104.

The previous prime is 1311325133. The next prime is 1311325159. The reversal of 1311325135 is 5315231131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5315231131 = 7 ⋅759318733.

It is a cyclic number.

It is not a de Polignac number, because 1311325135 - 2¹ = 1311325133 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 (1311325133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131132509 + ... + 131132518.

It is an arithmetic number, because the mean of its divisors is an integer number (393397542).

Almost surely, 2^1311325135 is an apocalyptic number.

1311325135 is a deficient number, since it is larger than the sum of its proper divisors (262265033).

1311325135 is an equidigital number, since it uses as much as digits as its factorization.

1311325135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262265032.

The product of its digits is 1350, while the sum is 25.

The square root of 1311325135 is about 36212.2235577988. The cubic root of 1311325135 is about 1094.5529989543.

Adding to 1311325135 its reverse (5315231131), we get a palindrome (6626556266).

The spelling of 1311325135 in words is "one billion, three hundred eleven million, three hundred twenty-five thousand, one hundred thirty-five".