9985851 has 12 divisors (see below), whose sum is σ = 15272712. Its totient is φ = 6265536.

The previous prime is 9985799. The next prime is 9985853. The reversal of 9985851 is 1585899.

It is not a de Polignac number, because 9985851 - 2¹⁰ = 9984827 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9985797 and 9985806.

It is not an unprimeable number, because it can be changed into a prime (9985853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32481 + ... + 32786.

It is an arithmetic number, because the mean of its divisors is an integer number (1272726).

Almost surely, 2^9985851 is an apocalyptic number.

9985851 is a deficient number, since it is larger than the sum of its proper divisors (5286861).

9985851 is a wasteful number, since it uses less digits than its factorization.

9985851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65290 (or 65287 counting only the distinct ones).

The product of its digits is 129600, while the sum is 45.

The square root of 9985851 is about 3160.0397149403. The cubic root of 9985851 is about 215.3418107212.

The spelling of 9985851 in words is "nine million, nine hundred eighty-five thousand, eight hundred fifty-one".