1085642665 has 8 divisors (see below), whose sum is σ = 1359413568. Its totient is φ = 830752560.

The previous prime is 1085642659. The next prime is 1085642669. The reversal of 1085642665 is 5662465801.

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

It is not a de Polignac number, because 1085642665 - 2⁵ = 1085642633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1085642669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4720071 + ... + 4720300.

It is an arithmetic number, because the mean of its divisors is an integer number (169926696).

Almost surely, 2^1085642665 is an apocalyptic number.

It is an amenable number.

1085642665 is a deficient number, since it is larger than the sum of its proper divisors (273770903).

1085642665 is an equidigital number, since it uses as much as digits as its factorization.

1085642665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9440399.

The product of its (nonzero) digits is 345600, while the sum is 43.

The square root of 1085642665 is about 32949.0920208737. The cubic root of 1085642665 is about 1027.7692839316.

The spelling of 1085642665 in words is "one billion, eighty-five million, six hundred forty-two thousand, six hundred sixty-five".