3005521 has 2 divisors, whose sum is σ = 3005522. Its totient is φ = 3005520.

The previous prime is 3005507. The next prime is 3005551. The reversal of 3005521 is 1255003.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2873025 + 132496 = 1695^2 + 364^2 .

It is a cyclic number.

It is not a de Polignac number, because 3005521 - 2⁵ = 3005489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3005495 and 3005504.

It is not a weakly prime, because it can be changed into another prime (3005551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1502760 + 1502761.

It is an arithmetic number, because the mean of its divisors is an integer number (1502761).

Almost surely, 2^3005521 is an apocalyptic number.

It is an amenable number.

3005521 is a deficient number, since it is larger than the sum of its proper divisors (1).

3005521 is an equidigital number, since it uses as much as digits as its factorization.

3005521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 3005521 is about 1733.6438503914. The cubic root of 3005521 is about 144.3133768109.

The spelling of 3005521 in words is "three million, five thousand, five hundred twenty-one".