9975281 has 2 divisors, whose sum is σ = 9975282. Its totient is φ = 9975280.

The previous prime is 9975263. The next prime is 9975299. The reversal of 9975281 is 1825799.

9975281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (9975263) and next prime (9975299).

It can be written as a sum of positive squares in only one way, i.e., 6806881 + 3168400 = 2609^2 + 1780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9975281 is a prime.

It is a super-2 number, since 2×9975281² = 199012462057922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (9975181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4987640 + 4987641.

It is an arithmetic number, because the mean of its divisors is an integer number (4987641).

Almost surely, 2^9975281 is an apocalyptic number.

It is an amenable number.

9975281 is a deficient number, since it is larger than the sum of its proper divisors (1).

9975281 is an equidigital number, since it uses as much as digits as its factorization.

9975281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 41.

The square root of 9975281 is about 3158.3668248004. The cubic root of 9975281 is about 215.2658042959.

The spelling of 9975281 in words is "nine million, nine hundred seventy-five thousand, two hundred eighty-one".