3600221 has 2 divisors, whose sum is σ = 3600222. Its totient is φ = 3600220.

The previous prime is 3600217. The next prime is 3600269. The reversal of 3600221 is 1220063.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3463321 + 136900 = 1861^2 + 370^2 .

It is a cyclic number.

It is not a de Polignac number, because 3600221 - 2² = 3600217 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3600196 and 3600205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3600521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1800110 + 1800111.

It is an arithmetic number, because the mean of its divisors is an integer number (1800111).

Almost surely, 2^3600221 is an apocalyptic number.

It is an amenable number.

3600221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3600221 is an equidigital number, since it uses as much as digits as its factorization.

3600221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 3600221 is about 1897.4248338208. The cubic root of 3600221 is about 153.2650226068.

Adding to 3600221 its reverse (1220063), we get a palindrome (4820284).

The spelling of 3600221 in words is "three million, six hundred thousand, two hundred twenty-one".