9894561 has 16 divisors (see below), whose sum is σ = 14084928. Its totient is φ = 6156800.

The previous prime is 9894559. The next prime is 9894569. The reversal of 9894561 is 1654989.

It is a cyclic number.

It is not a de Polignac number, because 9894561 - 2¹ = 9894559 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9894569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5941 + ... + 7421.

It is an arithmetic number, because the mean of its divisors is an integer number (880308).

Almost surely, 2^9894561 is an apocalyptic number.

It is an amenable number.

9894561 is a deficient number, since it is larger than the sum of its proper divisors (4190367).

9894561 is a wasteful number, since it uses less digits than its factorization.

9894561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632.

The product of its digits is 77760, while the sum is 42.

The square root of 9894561 is about 3145.5621119285. The cubic root of 9894561 is about 214.6835872088.

The spelling of 9894561 in words is "nine million, eight hundred ninety-four thousand, five hundred sixty-one".