1316011265 has 4 divisors (see below), whose sum is σ = 1579213524. Its totient is φ = 1052809008.

The previous prime is 1316011243. The next prime is 1316011267. The reversal of 1316011265 is 5621106131.

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 787195249 + 528816016 = 28057^2 + 22996^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1316011265 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1316011267) 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, 131601122 + ... + 131601131.

It is an arithmetic number, because the mean of its divisors is an integer number (394803381).

Almost surely, 2^1316011265 is an apocalyptic number.

It is an amenable number.

1316011265 is a deficient number, since it is larger than the sum of its proper divisors (263202259).

1316011265 is an equidigital number, since it uses as much as digits as its factorization.

1316011265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263202258.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1316011265 is about 36276.8695589903. The cubic root of 1316011265 is about 1095.8552744703.

Adding to 1316011265 its reverse (5621106131), we get a palindrome (6937117396).

The spelling of 1316011265 in words is "one billion, three hundred sixteen million, eleven thousand, two hundred sixty-five".