1320542555 has 16 divisors (see below), whose sum is σ = 1624982688. Its totient is φ = 1029600000.

The previous prime is 1320542527. The next prime is 1320542567. The reversal of 1320542555 is 5552450231.

It is not a de Polignac number, because 1320542555 - 2⁶ = 1320542491 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237305 + ... + 242805.

It is an arithmetic number, because the mean of its divisors is an integer number (101561418).

Almost surely, 2^1320542555 is an apocalyptic number.

1320542555 is a deficient number, since it is larger than the sum of its proper divisors (304440133).

1320542555 is a wasteful number, since it uses less digits than its factorization.

1320542555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6718.

The product of its (nonzero) digits is 30000, while the sum is 32.

The square root of 1320542555 is about 36339.2701495228. The cubic root of 1320542555 is about 1097.1115832946. Note that the first 3 decimals are identical.

Adding to 1320542555 its reverse (5552450231), we get a palindrome (6872992786).

The spelling of 1320542555 in words is "one billion, three hundred twenty million, five hundred forty-two thousand, five hundred fifty-five".