9555521 has 2 divisors, whose sum is σ = 9555522. Its totient is φ = 9555520.

The previous prime is 9555493. The next prime is 9555527. The reversal of 9555521 is 1255559.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8473921 + 1081600 = 2911^2 + 1040^2 .

It is an emirp because it is prime and its reverse (1255559) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9555521 - 2¹⁴ = 9539137 is a prime.

It is a Chen prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (9555527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4777760 + 4777761.

It is an arithmetic number, because the mean of its divisors is an integer number (4777761).

Almost surely, 2^9555521 is an apocalyptic number.

It is an amenable number.

9555521 is a deficient number, since it is larger than the sum of its proper divisors (1).

9555521 is an equidigital number, since it uses as much as digits as its factorization.

9555521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11250, while the sum is 32.

The square root of 9555521 is about 3091.2005758281. The cubic root of 9555521 is about 212.2029695516.

The spelling of 9555521 in words is "nine million, five hundred fifty-five thousand, five hundred twenty-one".