1311361275 has 72 divisors (see below), whose sum is σ = 2547787824. Its totient is φ = 593376000.

The previous prime is 1311361231. The next prime is 1311361313. The reversal of 1311361275 is 5721631131.

It is not a de Polignac number, because 1311361275 - 2¹¹ = 1311359227 is a prime.

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 71 ways as a sum of consecutive naturals, for example, 369409 + ... + 372941.

It is an arithmetic number, because the mean of its divisors is an integer number (35385942).

Almost surely, 2^1311361275 is an apocalyptic number.

1311361275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1311361275 is a deficient number, since it is larger than the sum of its proper divisors (1236426549).

1311361275 is a wasteful number, since it uses less digits than its factorization.

1311361275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3661 (or 3649 counting only the distinct ones).

The product of its digits is 3780, while the sum is 30.

The square root of 1311361275 is about 36212.7225571345. The cubic root of 1311361275 is about 1094.5630541219.

The spelling of 1311361275 in words is "one billion, three hundred eleven million, three hundred sixty-one thousand, two hundred seventy-five".