9840641 has 4 divisors (see below), whose sum is σ = 9951300. Its totient is φ = 9729984.

The previous prime is 9840617. The next prime is 9840643. The reversal of 9840641 is 1460489.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1460489 = 181 ⋅8069.

It can be written as a sum of positive squares in 2 ways, for example, as 3690241 + 6150400 = 1921^2 + 2480^2 .

It is a cyclic number.

It is not a de Polignac number, because 9840641 - 2⁶ = 9840577 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9840598 and 9840607.

It is not an unprimeable number, because it can be changed into a prime (9840643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55196 + ... + 55373.

It is an arithmetic number, because the mean of its divisors is an integer number (2487825).

Almost surely, 2^9840641 is an apocalyptic number.

It is an amenable number.

9840641 is a deficient number, since it is larger than the sum of its proper divisors (110659).

9840641 is a wasteful number, since it uses less digits than its factorization.

9840641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110658.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 9840641 is about 3136.9795982760. The cubic root of 9840641 is about 214.2929069120.

The spelling of 9840641 in words is "nine million, eight hundred forty thousand, six hundred forty-one".