3228921 has 6 divisors (see below), whose sum is σ = 4664010. Its totient is φ = 2152608.

The previous prime is 3228899. The next prime is 3228937. The reversal of 3228921 is 1298223.

It is a happy number.

3228921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1929321 + 1299600 = 1389^2 + 1140^2 .

It is not a de Polignac number, because 3228921 - 2⁶ = 3228857 is a prime.

It is an Ulam number.

3228921 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3228961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 179376 + ... + 179393.

It is an arithmetic number, because the mean of its divisors is an integer number (777335).

Almost surely, 2^3228921 is an apocalyptic number.

It is an amenable number.

3228921 is a deficient number, since it is larger than the sum of its proper divisors (1435089).

3228921 is a wasteful number, since it uses less digits than its factorization.

3228921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358775 (or 358772 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 3228921 is about 1796.9198646573. The cubic root of 3228921 is about 147.8038703474.

The spelling of 3228921 in words is "three million, two hundred twenty-eight thousand, nine hundred twenty-one".