9728261 has 2 divisors, whose sum is σ = 9728262. Its totient is φ = 9728260.

The previous prime is 9728249. The next prime is 9728263. The reversal of 9728261 is 1628279.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9728161 + 100 = 3119^2 + 10^2 .

It is an emirp because it is prime and its reverse (1628279) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9728261 - 2⁶ = 9728197 is a prime.

Together with 9728263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9728263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4864130 + 4864131.

It is an arithmetic number, because the mean of its divisors is an integer number (4864131).

Almost surely, 2^9728261 is an apocalyptic number.

It is an amenable number.

9728261 is a deficient number, since it is larger than the sum of its proper divisors (1).

9728261 is an equidigital number, since it uses as much as digits as its factorization.

9728261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 35.

The square root of 9728261 is about 3119.0160307379. The cubic root of 9728261 is about 213.4740410167.

The spelling of 9728261 in words is "nine million, seven hundred twenty-eight thousand, two hundred sixty-one".