1311301465 has 4 divisors (see below), whose sum is σ = 1573561764. Its totient is φ = 1049041168.

The previous prime is 1311301451. The next prime is 1311301513. The reversal of 1311301465 is 5641031131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 610534681 + 700766784 = 24709^2 + 26472^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311301465 is a prime.

It is a super-2 number, since 2×1311301465² = 3439023064222292450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 131130142 + ... + 131130151.

It is an arithmetic number, because the mean of its divisors is an integer number (393390441).

Almost surely, 2^1311301465 is an apocalyptic number.

It is an amenable number.

1311301465 is a deficient number, since it is larger than the sum of its proper divisors (262260299).

1311301465 is an equidigital number, since it uses as much as digits as its factorization.

1311301465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262260298.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1311301465 is about 36211.8967329799. The cubic root of 1311301465 is about 1094.5464131924.

Adding to 1311301465 its reverse (5641031131), we get a palindrome (6952332596).

The spelling of 1311301465 in words is "one billion, three hundred eleven million, three hundred one thousand, four hundred sixty-five".