1320544045 has 16 divisors (see below), whose sum is σ = 1641646080. Its totient is φ = 1018684800.

The previous prime is 1320543989. The next prime is 1320544067. The reversal of 1320544045 is 5404450231.

It is not a de Polignac number, because 1320544045 - 2²³ = 1312155437 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28396 + ... + 58714.

It is an arithmetic number, because the mean of its divisors is an integer number (102602880).

Almost surely, 2^1320544045 is an apocalyptic number.

It is an amenable number.

1320544045 is a deficient number, since it is larger than the sum of its proper divisors (321102035).

1320544045 is a wasteful number, since it uses less digits than its factorization.

1320544045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30636.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 1320544045 is about 36339.2906507543. The cubic root of 1320544045 is about 1097.1119959269. Note that the first 3 decimals are identical.

Adding to 1320544045 its reverse (5404450231), we get a palindrome (6724994276).

The spelling of 1320544045 in words is "one billion, three hundred twenty million, five hundred forty-four thousand, forty-five".