1320311756 has 6 divisors (see below), whose sum is σ = 2310545580. Its totient is φ = 660155876.

The previous prime is 1320311747. The next prime is 1320311771. The reversal of 1320311756 is 6571130231.

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 as a sum of consecutive naturals, namely, 165038966 + ... + 165038973.

It is an arithmetic number, because the mean of its divisors is an integer number (385090930).

Almost surely, 2^1320311756 is an apocalyptic number.

It is an amenable number.

1320311756 is a deficient number, since it is larger than the sum of its proper divisors (990233824).

1320311756 is a wasteful number, since it uses less digits than its factorization.

1320311756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330077943 (or 330077941 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 1320311756 is about 36336.0943966189. The cubic root of 1320311756 is about 1097.0476633529.

Adding to 1320311756 its reverse (6571130231), we get a palindrome (7891441987).

The spelling of 1320311756 in words is "one billion, three hundred twenty million, three hundred eleven thousand, seven hundred fifty-six".