3321643 has 4 divisors (see below), whose sum is σ = 3577168. Its totient is φ = 3066120.

The previous prime is 3321629. The next prime is 3321653. The reversal of 3321643 is 3461233.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3321643 - 2⁵ = 3321611 is a prime.

It is a super-2 number, since 2×3321643² = 22066624438898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3321623) 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, 127743 + ... + 127768.

It is an arithmetic number, because the mean of its divisors is an integer number (894292).

Almost surely, 2^3321643 is an apocalyptic number.

3321643 is a deficient number, since it is larger than the sum of its proper divisors (255525).

3321643 is a wasteful number, since it uses less digits than its factorization.

3321643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255524.

The product of its digits is 1296, while the sum is 22.

The square root of 3321643 is about 1822.5375167606. The cubic root of 3321643 is about 149.2053232868.

Adding to 3321643 its reverse (3461233), we get a palindrome (6782876).

The spelling of 3321643 in words is "three million, three hundred twenty-one thousand, six hundred forty-three".