1128247665 has 8 divisors (see below), whose sum is σ = 1805196288. Its totient is φ = 601732080.

The previous prime is 1128247663. The next prime is 1128247667. The reversal of 1128247665 is 5667428211.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1128247663) and next prime (1128247667).

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

It is not a de Polignac number, because 1128247665 - 2¹ = 1128247663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1128247661) by changing a digit.

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, 37608241 + ... + 37608270.

It is an arithmetic number, because the mean of its divisors is an integer number (225649536).

Almost surely, 2^1128247665 is an apocalyptic number.

1128247665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1128247665 is a deficient number, since it is larger than the sum of its proper divisors (676948623).

1128247665 is an equidigital number, since it uses as much as digits as its factorization.

1128247665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75216519.

The product of its digits is 161280, while the sum is 42.

The square root of 1128247665 is about 33589.3981041638. The cubic root of 1128247665 is about 1041.0417523102.

The spelling of 1128247665 in words is "one billion, one hundred twenty-eight million, two hundred forty-seven thousand, six hundred sixty-five".