1320542747 has 16 divisors (see below), whose sum is σ = 1355551200. Its totient is φ = 1286164992.

The previous prime is 1320542737. The next prime is 1320542759. The reversal of 1320542747 is 7472450231.

It is a cyclic number.

It is not a de Polignac number, because 1320542747 - 2⁶ = 1320542683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320542737) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 1801193 + ... + 1801925.

It is an arithmetic number, because the mean of its divisors is an integer number (84721950).

Almost surely, 2^1320542747 is an apocalyptic number.

1320542747 is a deficient number, since it is larger than the sum of its proper divisors (35008453).

1320542747 is a wasteful number, since it uses less digits than its factorization.

1320542747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102.

The product of its (nonzero) digits is 47040, while the sum is 35.

The square root of 1320542747 is about 36339.2727912929. The cubic root of 1320542747 is about 1097.1116364660. Note that the first 3 decimals are identical.

Adding to 1320542747 its reverse (7472450231), we get a palindrome (8792992978).

The spelling of 1320542747 in words is "one billion, three hundred twenty million, five hundred forty-two thousand, seven hundred forty-seven".