9261945121 has 27 divisors (see below), whose sum is σ = 11040243417. Its totient is φ = 7760712960.

The previous prime is 9261945109. The next prime is 9261945149. The reversal of 9261945121 is 1215491629.

The square root of 9261945121 is 96239.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2671752721 + 6590192400 = 51689^2 + 81180^2 .

It is not a de Polignac number, because 9261945121 - 2⁵ = 9261945089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9261945421) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 13761841 + ... + 13762513.

Almost surely, 2^9261945121 is an apocalyptic number.

9261945121 is the 96239-th square number.

9261945121 is the 48120-th centered octagonal number.

It is an amenable number.

9261945121 is a deficient number, since it is larger than the sum of its proper divisors (1778298296).

9261945121 is an equidigital number, since it uses as much as digits as its factorization.

9261945121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394 (or 697 counting only the distinct ones).

The product of its digits is 38880, while the sum is 40.

The cubic root of 9261945121 is about 2100.0714352873.

The spelling of 9261945121 in words is "nine billion, two hundred sixty-one million, nine hundred forty-five thousand, one hundred twenty-one".