1230651665 has 8 divisors (see below), whose sum is σ = 1477142568. Its totient is φ = 984280960.

The previous prime is 1230651659. The next prime is 1230651689. The reversal of 1230651665 is 5661560321.

It can be written as a sum of positive squares in 4 ways, for example, as 525005569 + 705646096 = 22913^2 + 26564^2 .

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

It is not a de Polignac number, because 1230651665 - 2⁴ = 1230651649 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5732 + ... + 49941.

It is an arithmetic number, because the mean of its divisors is an integer number (184642821).

Almost surely, 2^1230651665 is an apocalyptic number.

It is an amenable number.

1230651665 is a deficient number, since it is larger than the sum of its proper divisors (246490903).

1230651665 is an equidigital number, since it uses as much as digits as its factorization.

1230651665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60099.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 1230651665 is about 35080.6451622544. The cubic root of 1230651665 is about 1071.6304560061.

The spelling of 1230651665 in words is "one billion, two hundred thirty million, six hundred fifty-one thousand, six hundred sixty-five".