9872845 has 4 divisors (see below), whose sum is σ = 11847420. Its totient is φ = 7898272.

The previous prime is 9872839. The next prime is 9872887. The reversal of 9872845 is 5482789.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2550409 + 7322436 = 1597^2 + 2706^2 .

It is a cyclic number.

It is not a de Polignac number, because 9872845 - 2⁷ = 9872717 is a prime.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 987280 + ... + 987289.

It is an arithmetic number, because the mean of its divisors is an integer number (2961855).

Almost surely, 2^9872845 is an apocalyptic number.

It is an amenable number.

9872845 is a deficient number, since it is larger than the sum of its proper divisors (1974575).

9872845 is a wasteful number, since it uses less digits than its factorization.

9872845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1974574.

The product of its digits is 161280, while the sum is 43.

The square root of 9872845 is about 3142.1083685958. The cubic root of 9872845 is about 214.5264138680.

The spelling of 9872845 in words is "nine million, eight hundred seventy-two thousand, eight hundred forty-five".