9865144 has 8 divisors (see below), whose sum is σ = 18497160. Its totient is φ = 4932568.

The previous prime is 9865139. The next prime is 9865153. The reversal of 9865144 is 4415689.

It is a happy number.

9865144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×9865144² = 194642132281472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616564 + ... + 616579.

It is an arithmetic number, because the mean of its divisors is an integer number (2312145).

Almost surely, 2^9865144 is an apocalyptic number.

It is an amenable number.

9865144 is a deficient number, since it is larger than the sum of its proper divisors (8632016).

9865144 is a wasteful number, since it uses less digits than its factorization.

9865144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233149 (or 1233145 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 9865144 is about 3140.8826784839. The cubic root of 9865144 is about 214.4706211812.

The spelling of 9865144 in words is "nine million, eight hundred sixty-five thousand, one hundred forty-four".