9561557 has 2 divisors, whose sum is σ = 9561558. Its totient is φ = 9561556.

The previous prime is 9561551. The next prime is 9561611. The reversal of 9561557 is 7551659.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7447441 + 2114116 = 2729^2 + 1454^2 .

It is a cyclic number.

It is not a de Polignac number, because 9561557 - 2⁸ = 9561301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9561557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9561551) 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, 4780778 + 4780779.

It is an arithmetic number, because the mean of its divisors is an integer number (4780779).

Almost surely, 2^9561557 is an apocalyptic number.

It is an amenable number.

9561557 is a deficient number, since it is larger than the sum of its proper divisors (1).

9561557 is an equidigital number, since it uses as much as digits as its factorization.

9561557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47250, while the sum is 38.

The square root of 9561557 is about 3092.1767413911. The cubic root of 9561557 is about 212.2476413709.

The spelling of 9561557 in words is "nine million, five hundred sixty-one thousand, five hundred fifty-seven".