3662521 has 2 divisors, whose sum is σ = 3662522. Its totient is φ = 3662520.

The previous prime is 3662473. The next prime is 3662537. The reversal of 3662521 is 1252663.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3258025 + 404496 = 1805^2 + 636^2 .

It is an emirp because it is prime and its reverse (1252663) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3662521 is a prime.

It is not a weakly prime, because it can be changed into another prime (3662551) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1831260 + 1831261.

It is an arithmetic number, because the mean of its divisors is an integer number (1831261).

Almost surely, 2^3662521 is an apocalyptic number.

It is an amenable number.

3662521 is a deficient number, since it is larger than the sum of its proper divisors (1).

3662521 is an equidigital number, since it uses as much as digits as its factorization.

3662521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 25.

The square root of 3662521 is about 1913.7714074570. The cubic root of 3662521 is about 154.1440295307.

The spelling of 3662521 in words is "three million, six hundred sixty-two thousand, five hundred twenty-one".