9681281 has 2 divisors, whose sum is σ = 9681282. Its totient is φ = 9681280.

The previous prime is 9681277. The next prime is 9681283. The reversal of 9681281 is 1821869.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8761600 + 919681 = 2960^2 + 959^2 .

It is a cyclic number.

It is not a de Polignac number, because 9681281 - 2² = 9681277 is a prime.

It is a super-2 number, since 2×9681281² = 187454403601922, which contains 22 as substring.

Together with 9681283, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9681283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4840640 + 4840641.

It is an arithmetic number, because the mean of its divisors is an integer number (4840641).

Almost surely, 2^9681281 is an apocalyptic number.

It is an amenable number.

9681281 is a deficient number, since it is larger than the sum of its proper divisors (1).

9681281 is an equidigital number, since it uses as much as digits as its factorization.

9681281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 35.

The square root of 9681281 is about 3111.4756949075. The cubic root of 9681281 is about 213.1298480162.

The spelling of 9681281 in words is "nine million, six hundred eighty-one thousand, two hundred eighty-one".