9864945 has 24 divisors (see below), whose sum is σ = 17185896. Its totient is φ = 5234688.

The previous prime is 9864937. The next prime is 9864949. The reversal of 9864945 is 5494689.

It is a happy number.

9864945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1361889 + 8503056 = 1167^2 + 2916^2 .

It is not a de Polignac number, because 9864945 - 2³ = 9864937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 9864945.

It is not an unprimeable number, because it can be changed into a prime (9864949) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11139 + ... + 11991.

It is an arithmetic number, because the mean of its divisors is an integer number (716079).

Almost surely, 2^9864945 is an apocalyptic number.

It is an amenable number.

9864945 is a deficient number, since it is larger than the sum of its proper divisors (7320951).

9864945 is a wasteful number, since it uses less digits than its factorization.

9864945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121 (or 1118 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 9864945 is about 3140.8509993312. The cubic root of 9864945 is about 214.4691790688.

The spelling of 9864945 in words is "nine million, eight hundred sixty-four thousand, nine hundred forty-five".