1311404144 has 10 divisors (see below), whose sum is σ = 2540845560. Its totient is φ = 655702064.

The previous prime is 1311404119. The next prime is 1311404161. The reversal of 1311404144 is 4414041131.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 40981364 + ... + 40981395.

It is an arithmetic number, because the mean of its divisors is an integer number (254084556).

Almost surely, 2^1311404144 is an apocalyptic number.

It is an amenable number.

1311404144 is a deficient number, since it is larger than the sum of its proper divisors (1229441416).

1311404144 is an equidigital number, since it uses as much as digits as its factorization.

1311404144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81962767 (or 81962761 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 1311404144 is about 36213.3144575307. The cubic root of 1311404144 is about 1094.5749812476.

Adding to 1311404144 its reverse (4414041131), we get a palindrome (5725445275).

The spelling of 1311404144 in words is "one billion, three hundred eleven million, four hundred four thousand, one hundred forty-four".