9865216 has 24 divisors (see below), whose sum is σ = 19729710. Its totient is φ = 4931584.

The previous prime is 9865211. The next prime is 9865241. The reversal of 9865216 is 6125689.

It can be written as a sum of positive squares in only one way, i.e., 9634816 + 230400 = 3104^2 + 480^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9865211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 361 + ... + 4456.

Almost surely, 2^9865216 is an apocalyptic number.

It is an amenable number.

9865216 is a deficient number, since it is larger than the sum of its proper divisors (9864494).

9865216 is an equidigital number, since it uses as much as digits as its factorization.

9865216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4839 (or 4819 counting only the distinct ones).

The product of its digits is 25920, while the sum is 37.

The square root of 9865216 is about 3140.8941402091. The cubic root of 9865216 is about 214.4711429458.

The spelling of 9865216 in words is "nine million, eight hundred sixty-five thousand, two hundred sixteen".