1320749756 has 6 divisors (see below), whose sum is σ = 2311312080. Its totient is φ = 660374876.

The previous prime is 1320749719. The next prime is 1320749779. The reversal of 1320749756 is 6579470231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165093716 + ... + 165093723.

It is an arithmetic number, because the mean of its divisors is an integer number (385218680).

Almost surely, 2^1320749756 is an apocalyptic number.

It is an amenable number.

1320749756 is a deficient number, since it is larger than the sum of its proper divisors (990562324).

1320749756 is a wasteful number, since it uses less digits than its factorization.

1320749756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330187443 (or 330187441 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 44.

The square root of 1320749756 is about 36342.1209617711. The cubic root of 1320749756 is about 1097.1689614099.

The spelling of 1320749756 in words is "one billion, three hundred twenty million, seven hundred forty-nine thousand, seven hundred fifty-six".