1311389842 has 32 divisors (see below), whose sum is σ = 2414736000. Its totient is φ = 532438704.

The previous prime is 1311389839. The next prime is 1311389857. The reversal of 1311389842 is 2489831131.

It is a junction number, because it is equal to n+sod(n) for n = 1311389795 and 1311389804.

It is an unprimeable number.

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, 37273 + ... + 63340.

It is an arithmetic number, because the mean of its divisors is an integer number (75460500).

Almost surely, 2^1311389842 is an apocalyptic number.

1311389842 is a deficient number, since it is larger than the sum of its proper divisors (1103346158).

1311389842 is a wasteful number, since it uses less digits than its factorization.

1311389842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100655 (or 100641 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The square root of 1311389842 is about 36213.1169881854. The cubic root of 1311389842 is about 1094.5710021365.

The spelling of 1311389842 in words is "one billion, three hundred eleven million, three hundred eighty-nine thousand, eight hundred forty-two".