9781265 has 16 divisors (see below), whose sum is σ = 13078800. Its totient is φ = 6972672.

The previous prime is 9781259. The next prime is 9781267. The reversal of 9781265 is 5621879.

It can be written as a sum of positive squares in 8 ways, for example, as 96721 + 9684544 = 311^2 + 3112^2 .

It is a cyclic number.

It is not a de Polignac number, because 9781265 - 2⁴ = 9781249 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9781267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 710 + ... + 4479.

It is an arithmetic number, because the mean of its divisors is an integer number (817425).

Almost surely, 2^9781265 is an apocalyptic number.

It is an amenable number.

9781265 is a deficient number, since it is larger than the sum of its proper divisors (3297535).

9781265 is a wasteful number, since it uses less digits than its factorization.

9781265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5236.

The product of its digits is 30240, while the sum is 38.

The square root of 9781265 is about 3127.5013988806. The cubic root of 9781265 is about 213.8610403077.

The spelling of 9781265 in words is "nine million, seven hundred eighty-one thousand, two hundred sixty-five".