1311687148 has 48 divisors (see below), whose sum is σ = 2500714944. Its totient is φ = 600272640.

The previous prime is 1311687133. The next prime is 1311687187. The reversal of 1311687148 is 8417861131.

It is a self number, because there is not a number n which added to its sum of digits gives 1311687148.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204486 + ... + 210802.

It is an arithmetic number, because the mean of its divisors is an integer number (52098228).

Almost surely, 2^1311687148 is an apocalyptic number.

It is an amenable number.

1311687148 is a deficient number, since it is larger than the sum of its proper divisors (1189027796).

1311687148 is a wasteful number, since it uses less digits than its factorization.

1311687148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6442 (or 6440 counting only the distinct ones).

The product of its digits is 32256, while the sum is 40.

The square root of 1311687148 is about 36217.2217045979. The cubic root of 1311687148 is about 1094.6537128421.

The spelling of 1311687148 in words is "one billion, three hundred eleven million, six hundred eighty-seven thousand, one hundred forty-eight".