9865505 has 16 divisors (see below), whose sum is σ = 13305600. Its totient is φ = 6967488.

The previous prime is 9865451. The next prime is 9865511. The reversal of 9865505 is 5055689.

It is a cyclic number.

It is not a de Polignac number, because 9865505 - 2¹² = 9861409 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1805 + ... + 4794.

It is an arithmetic number, because the mean of its divisors is an integer number (831600).

Almost surely, 2^9865505 is an apocalyptic number.

It is an amenable number.

9865505 is a deficient number, since it is larger than the sum of its proper divisors (3440095).

9865505 is a wasteful number, since it uses less digits than its factorization.

9865505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6640.

The product of its (nonzero) digits is 54000, while the sum is 38.

The square root of 9865505 is about 3140.9401458799. The cubic root of 9865505 is about 214.4732372251.

The spelling of 9865505 in words is "nine million, eight hundred sixty-five thousand, five hundred five".