3630321 has 6 divisors (see below), whose sum is σ = 5243810. Its totient is φ = 2420208.

The previous prime is 3630281. The next prime is 3630323. The reversal of 3630321 is 1230363.

It is a happy number.

3630321 is a `hidden beast` number, since 3 + 630 + 32 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3629025 + 1296 = 1905^2 + 36^2 .

It is not a de Polignac number, because 3630321 - 2⁶ = 3630257 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3630294 and 3630303.

It is not an unprimeable number, because it can be changed into a prime (3630323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 201676 + ... + 201693.

Almost surely, 2^3630321 is an apocalyptic number.

It is an amenable number.

3630321 is a deficient number, since it is larger than the sum of its proper divisors (1613489).

3630321 is a wasteful number, since it uses less digits than its factorization.

3630321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403375 (or 403372 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 3630321 is about 1905.3401271164. The cubic root of 3630321 is about 153.6909668272.

Adding to 3630321 its reverse (1230363), we get a palindrome (4860684).

The spelling of 3630321 in words is "three million, six hundred thirty thousand, three hundred twenty-one".