1042311665 has 4 divisors (see below), whose sum is σ = 1250774004. Its totient is φ = 833849328.

The previous prime is 1042311659. The next prime is 1042311689. The reversal of 1042311665 is 5661132401.

It is a happy number.

1042311665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5661132401 = 829 ⋅6828869.

It can be written as a sum of positive squares in 2 ways, for example, as 768342961 + 273968704 = 27719^2 + 16552^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042311665 - 2⁶ = 1042311601 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104231162 + ... + 104231171.

It is an arithmetic number, because the mean of its divisors is an integer number (312693501).

Almost surely, 2^1042311665 is an apocalyptic number.

It is an amenable number.

1042311665 is a deficient number, since it is larger than the sum of its proper divisors (208462339).

1042311665 is an equidigital number, since it uses as much as digits as its factorization.

1042311665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208462338.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1042311665 is about 32284.8519432876. The cubic root of 1042311665 is about 1013.9095166340.

The spelling of 1042311665 in words is "one billion, forty-two million, three hundred eleven thousand, six hundred sixty-five".