3328921 has 4 divisors (see below), whose sum is σ = 3342132. Its totient is φ = 3315712.

The previous prime is 3328909. The next prime is 3328961. The reversal of 3328921 is 1298233.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1298233 = 157 ⋅8269.

It can be written as a sum of positive squares in 2 ways, for example, as 1974025 + 1354896 = 1405^2 + 1164^2 .

It is a cyclic number.

It is not a de Polignac number, because 3328921 - 2¹⁷ = 3197849 is a prime.

It is a super-2 number, since 2×3328921² = 22163430048482, which contains 22 as substring.

It is a Duffinian number.

3328921 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3328921.

It is not an unprimeable number, because it can be changed into a prime (3328901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6220 + ... + 6733.

It is an arithmetic number, because the mean of its divisors is an integer number (835533).

It is a 252-hyperperfect number.

Almost surely, 2^3328921 is an apocalyptic number.

It is an amenable number.

3328921 is a deficient number, since it is larger than the sum of its proper divisors (13211).

3328921 is a wasteful number, since it uses less digits than its factorization.

3328921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13210.

The product of its digits is 2592, while the sum is 28.

The square root of 3328921 is about 1824.5330909578. The cubic root of 3328921 is about 149.3142176097.

The spelling of 3328921 in words is "three million, three hundred twenty-eight thousand, nine hundred twenty-one".