3630621 has 4 divisors (see below), whose sum is σ = 4840832. Its totient is φ = 2420412.

The previous prime is 3630611. The next prime is 3630629. The reversal of 3630621 is 1260363.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3630621 - 2¹⁰ = 3629597 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3630629) 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 3 ways as a sum of consecutive naturals, for example, 605101 + ... + 605106.

It is an arithmetic number, because the mean of its divisors is an integer number (1210208).

Almost surely, 2^3630621 is an apocalyptic number.

It is an amenable number.

3630621 is a deficient number, since it is larger than the sum of its proper divisors (1210211).

3630621 is a wasteful number, since it uses less digits than its factorization.

3630621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210210.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 3630621 is about 1905.4188515914. The cubic root of 3630621 is about 153.6952002471.

Adding to 3630621 its reverse (1260363), we get a palindrome (4890984).

The spelling of 3630621 in words is "three million, six hundred thirty thousand, six hundred twenty-one".