1320884555 has 8 divisors (see below), whose sum is σ = 1585330944. Its totient is φ = 1056528000.

The previous prime is 1320884471. The next prime is 1320884561. The reversal of 1320884555 is 5554880231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1320884555 - 2¹² = 1320880459 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 7 ways as a sum of consecutive naturals, for example, 15830 + ... + 53780.

It is an arithmetic number, because the mean of its divisors is an integer number (198166368).

Almost surely, 2^1320884555 is an apocalyptic number.

1320884555 is a deficient number, since it is larger than the sum of its proper divisors (264446389).

1320884555 is an equidigital number, since it uses as much as digits as its factorization.

1320884555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44917.

The product of its (nonzero) digits is 192000, while the sum is 41.

The square root of 1320884555 is about 36343.9754980107. The cubic root of 1320884555 is about 1097.2062867363.

The spelling of 1320884555 in words is "one billion, three hundred twenty million, eight hundred eighty-four thousand, five hundred fifty-five".