1311401144 has 16 divisors (see below), whose sum is σ = 2511194400. Its totient is φ = 641749312.

The previous prime is 1311401137. The next prime is 1311401159. The reversal of 1311401144 is 4411041131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1743509 + ... + 1744260.

It is an arithmetic number, because the mean of its divisors is an integer number (156949650).

Almost surely, 2^1311401144 is an apocalyptic number.

It is an amenable number.

1311401144 is a deficient number, since it is larger than the sum of its proper divisors (1199793256).

1311401144 is a wasteful number, since it uses less digits than its factorization.

1311401144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3487822 (or 3487818 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 1311401144 is about 36213.2730362777. The cubic root of 1311401144 is about 1094.5741465882.

Adding to 1311401144 its reverse (4411041131), we get a palindrome (5722442275).

The spelling of 1311401144 in words is "one billion, three hundred eleven million, four hundred one thousand, one hundred forty-four".