1311034660 has 48 divisors (see below), whose sum is σ = 2968113456. Its totient is φ = 483558912.

The previous prime is 1311034657. The next prime is 1311034663. The reversal of 1311034660 is 664301131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1311034657) and next prime (1311034663).

It can be written as a sum of positive squares in 8 ways, for example, as 393308224 + 917726436 = 19832^2 + 30294^2 .

It is not an unprimeable number, because it can be changed into a prime (1311034663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313302 + ... + 317458.

It is an arithmetic number, because the mean of its divisors is an integer number (61835697).

Almost surely, 2^1311034660 is an apocalyptic number.

1311034660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311034660 is an abundant number, since it is smaller than the sum of its proper divisors (1657078796).

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

1311034660 is a wasteful number, since it uses less digits than its factorization.

1311034660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5392 (or 5390 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 1311034660 is about 36208.2126043250. The cubic root of 1311034660 is about 1094.4721739037.

Adding to 1311034660 its reverse (664301131), we get a palindrome (1975335791).

The spelling of 1311034660 in words is "one billion, three hundred eleven million, thirty-four thousand, six hundred sixty".