9256561 has 2 divisors, whose sum is σ = 9256562. Its totient is φ = 9256560.

The previous prime is 9256537. The next prime is 9256571. The reversal of 9256561 is 1656529.

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., 9120400 + 136161 = 3020^2 + 369^2 .

It is a cyclic number.

It is not a de Polignac number, because 9256561 - 2¹¹ = 9254513 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (9256501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4628280 + 4628281.

It is an arithmetic number, because the mean of its divisors is an integer number (4628281).

Almost surely, 2^9256561 is an apocalyptic number.

It is an amenable number.

9256561 is a deficient number, since it is larger than the sum of its proper divisors (1).

9256561 is an equidigital number, since it uses as much as digits as its factorization.

9256561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 34.

The square root of 9256561 is about 3042.4596957067. The cubic root of 9256561 is about 209.9664421056.

It can be divided in two parts, 92565 and 61, that multiplied together give a palindrome (5646465).

The spelling of 9256561 in words is "nine million, two hundred fifty-six thousand, five hundred sixty-one".