9855641 has 4 divisors (see below), whose sum is σ = 9889572. Its totient is φ = 9821712.

The previous prime is 9855611. The next prime is 9855647. The reversal of 9855641 is 1465589.

9855641 is digitally balanced in base 3, 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: 1465589 = 251 ⋅5839.

It can be written as a sum of positive squares in 2 ways, for example, as 5107600 + 4748041 = 2260^2 + 2179^2 .

It is a cyclic number.

It is not a de Polignac number, because 9855641 - 2⁶ = 9855577 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9855595 and 9855604.

It is not an unprimeable number, because it can be changed into a prime (9855647) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 16526 + ... + 17111.

It is an arithmetic number, because the mean of its divisors is an integer number (2472393).

Almost surely, 2^9855641 is an apocalyptic number.

It is an amenable number.

9855641 is a deficient number, since it is larger than the sum of its proper divisors (33931).

9855641 is a wasteful number, since it uses less digits than its factorization.

9855641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33930.

The product of its digits is 43200, while the sum is 38.

The square root of 9855641 is about 3139.3695226908. The cubic root of 9855641 is about 214.4017332158.

The spelling of 9855641 in words is "nine million, eight hundred fifty-five thousand, six hundred forty-one".