7005521 has 2 divisors, whose sum is σ = 7005522. Its totient is φ = 7005520.

The previous prime is 7005511. The next prime is 7005527. The reversal of 7005521 is 1255007.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6076225 + 929296 = 2465^2 + 964^2 .

It is a cyclic number.

It is not a de Polignac number, because 7005521 - 2¹⁰ = 7004497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7005493 and 7005502.

It is not a weakly prime, because it can be changed into another prime (7005527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3502760 + 3502761.

It is an arithmetic number, because the mean of its divisors is an integer number (3502761).

Almost surely, 2^7005521 is an apocalyptic number.

It is an amenable number.

7005521 is a deficient number, since it is larger than the sum of its proper divisors (1).

7005521 is an equidigital number, since it uses as much as digits as its factorization.

7005521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 350, while the sum is 20.

The square root of 7005521 is about 2646.7944763430. The cubic root of 7005521 is about 191.3433969328.

The spelling of 7005521 in words is "seven million, five thousand, five hundred twenty-one".