9481561 has 2 divisors, whose sum is σ = 9481562. Its totient is φ = 9481560.

The previous prime is 9481559. The next prime is 9481601. The reversal of 9481561 is 1651849.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6095961 + 3385600 = 2469^2 + 1840^2 .

It is a cyclic number.

It is not a de Polignac number, because 9481561 - 2¹ = 9481559 is a prime.

Together with 9481559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (9481531) 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, 4740780 + 4740781.

It is an arithmetic number, because the mean of its divisors is an integer number (4740781).

Almost surely, 2^9481561 is an apocalyptic number.

It is an amenable number.

9481561 is a deficient number, since it is larger than the sum of its proper divisors (1).

9481561 is an equidigital number, since it uses as much as digits as its factorization.

9481561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 34.

The square root of 9481561 is about 3079.2143478491. The cubic root of 9481561 is about 211.6540652868.

The spelling of 9481561 in words is "nine million, four hundred eighty-one thousand, five hundred sixty-one".