1311234265 has 16 divisors (see below), whose sum is σ = 1718236800. Its totient is φ = 952673920.

The previous prime is 1311234203. The next prime is 1311234269. The reversal of 1311234265 is 5624321131.

It is not a de Polignac number, because 1311234265 - 2¹¹ = 1311232217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1311234269) 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 in 15 ways as a sum of consecutive naturals, for example, 46332 + ... + 69058.

It is an arithmetic number, because the mean of its divisors is an integer number (107389800).

Almost surely, 2^1311234265 is an apocalyptic number.

It is an amenable number.

1311234265 is a deficient number, since it is larger than the sum of its proper divisors (407002535).

1311234265 is a wasteful number, since it uses less digits than its factorization.

1311234265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23792.

The product of its digits is 4320, while the sum is 28.

The square root of 1311234265 is about 36210.9688492313. The cubic root of 1311234265 is about 1094.5277155404.

Adding to 1311234265 its reverse (5624321131), we get a palindrome (6935555396).

The spelling of 1311234265 in words is "one billion, three hundred eleven million, two hundred thirty-four thousand, two hundred sixty-five".