9611521 has 2 divisors, whose sum is σ = 9611522. Its totient is φ = 9611520.

The previous prime is 9611491. The next prime is 9611531. The reversal of 9611521 is 1251169.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9610000 + 1521 = 3100^2 + 39^2 .

It is a cyclic number.

It is not a de Polignac number, because 9611521 - 2¹⁵ = 9578753 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (9611531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4805760 + 4805761.

It is an arithmetic number, because the mean of its divisors is an integer number (4805761).

Almost surely, 2^9611521 is an apocalyptic number.

It is an amenable number.

9611521 is a deficient number, since it is larger than the sum of its proper divisors (1).

9611521 is an equidigital number, since it uses as much as digits as its factorization.

9611521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 25.

The square root of 9611521 is about 3100.2453128745. The cubic root of 9611521 is about 212.6166999133.

It can be divided in two parts, 961 and 1521, that multiplied together give a square (1461681 = 1209²).

The spelling of 9611521 in words is "nine million, six hundred eleven thousand, five hundred twenty-one".