1311265608 has 32 divisors (see below), whose sum is σ = 3358121760. Its totient is φ = 426427520.

The previous prime is 1311265583. The next prime is 1311265661. The reversal of 1311265608 is 8065621131.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 665310 + ... + 667277.

It is an arithmetic number, because the mean of its divisors is an integer number (104941305).

Almost surely, 2^1311265608 is an apocalyptic number.

It is an amenable number.

1311265608 is an abundant number, since it is smaller than the sum of its proper divisors (2046856152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311265608 is a wasteful number, since it uses less digits than its factorization.

1311265608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332637 (or 1332633 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 1311265608 is about 36211.4016298734. The cubic root of 1311265608 is about 1094.5364364608.

Adding to 1311265608 its reverse (8065621131), we get a palindrome (9376886739).

The spelling of 1311265608 in words is "one billion, three hundred eleven million, two hundred sixty-five thousand, six hundred eight".