1320544355 has 16 divisors (see below), whose sum is σ = 1761602304. Its totient is φ = 943712640.

The previous prime is 1320544331. The next prime is 1320544363. The reversal of 1320544355 is 5534450231.

It is a happy number.

It is not a de Polignac number, because 1320544355 - 2¹⁰ = 1320543331 is a prime.

It is a Duffinian number.

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 in 15 ways as a sum of consecutive naturals, for example, 325664 + ... + 329693.

It is an arithmetic number, because the mean of its divisors is an integer number (110100144).

Almost surely, 2^1320544355 is an apocalyptic number.

1320544355 is a deficient number, since it is larger than the sum of its proper divisors (441057949).

1320544355 is a wasteful number, since it uses less digits than its factorization.

1320544355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655406.

The product of its (nonzero) digits is 36000, while the sum is 32.

The square root of 1320544355 is about 36339.2949161098. The cubic root of 1320544355 is about 1097.1120817766.

Adding to 1320544355 its reverse (5534450231), we get a palindrome (6854994586).

The spelling of 1320544355 in words is "one billion, three hundred twenty million, five hundred forty-four thousand, three hundred fifty-five".