1288327265 has 8 divisors (see below), whose sum is σ = 1548293928. Its totient is φ = 1029127680.

The previous prime is 1288327253. The next prime is 1288327273. The reversal of 1288327265 is 5627238821.

It can be written as a sum of positive squares in 4 ways, for example, as 216943441 + 1071383824 = 14729^2 + 32732^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-1288327265 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188066 + ... + 194795.

It is an arithmetic number, because the mean of its divisors is an integer number (193536741).

Almost surely, 2^1288327265 is an apocalyptic number.

It is an amenable number.

1288327265 is a deficient number, since it is larger than the sum of its proper divisors (259966663).

1288327265 is an equidigital number, since it uses as much as digits as its factorization.

1288327265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383539.

The product of its digits is 322560, while the sum is 44.

The square root of 1288327265 is about 35893.2760416209. The cubic root of 1288327265 is about 1088.1165084940.

The spelling of 1288327265 in words is "one billion, two hundred eighty-eight million, three hundred twenty-seven thousand, two hundred sixty-five".