3243621 has 16 divisors (see below), whose sum is σ = 4671360. Its totient is φ = 1995840.

The previous prime is 3243613. The next prime is 3243629. The reversal of 3243621 is 1263423.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (3243613) and next prime (3243629).

It is not a de Polignac number, because 3243621 - 2³ = 3243613 is a prime.

3243621 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3243629) 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 15 ways as a sum of consecutive naturals, for example, 1191 + ... + 2811.

It is an arithmetic number, because the mean of its divisors is an integer number (291960).

Almost surely, 2^3243621 is an apocalyptic number.

It is an amenable number.

3243621 is a deficient number, since it is larger than the sum of its proper divisors (1427739).

3243621 is a wasteful number, since it uses less digits than its factorization.

3243621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1676.

The product of its digits is 864, while the sum is 21.

The square root of 3243621 is about 1801.0055524623. The cubic root of 3243621 is about 148.0278283439.

The spelling of 3243621 in words is "three million, two hundred forty-three thousand, six hundred twenty-one".