3669521 has 2 divisors, whose sum is σ = 3669522. Its totient is φ = 3669520.

The previous prime is 3669511. The next prime is 3669529. The reversal of 3669521 is 1259663.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1860496 + 1809025 = 1364^2 + 1345^2 .

It is an emirp because it is prime and its reverse (1259663) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3669521 - 2¹⁴ = 3653137 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3669529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1834760 + 1834761.

It is an arithmetic number, because the mean of its divisors is an integer number (1834761).

Almost surely, 2^3669521 is an apocalyptic number.

It is an amenable number.

3669521 is a deficient number, since it is larger than the sum of its proper divisors (1).

3669521 is an equidigital number, since it uses as much as digits as its factorization.

3669521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 32.

The square root of 3669521 is about 1915.5993840049. The cubic root of 3669521 is about 154.2421697204.

The spelling of 3669521 in words is "three million, six hundred sixty-nine thousand, five hundred twenty-one".