3380921 has 4 divisors (see below), whose sum is σ = 3384612. Its totient is φ = 3377232.

The previous prime is 3380893. The next prime is 3380929. The reversal of 3380921 is 1290833.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1290833 = 1093 ⋅1181.

It can be written as a sum of positive squares in 2 ways, for example, as 541696 + 2839225 = 736^2 + 1685^2 .

It is a cyclic number.

It is not a de Polignac number, because 3380921 - 2⁶ = 3380857 is a prime.

It is a super-2 number, since 2×3380921² = 22861253616482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3380929) 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, 695 + ... + 2691.

It is an arithmetic number, because the mean of its divisors is an integer number (846153).

Almost surely, 2^3380921 is an apocalyptic number.

It is an amenable number.

3380921 is a deficient number, since it is larger than the sum of its proper divisors (3691).

3380921 is a wasteful number, since it uses less digits than its factorization.

3380921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3690.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 3380921 is about 1838.7280930034. The cubic root of 3380921 is about 150.0876672715.

The spelling of 3380921 in words is "three million, three hundred eighty thousand, nine hundred twenty-one".