3408221 has 4 divisors (see below), whose sum is σ = 3430944. Its totient is φ = 3385500.

The previous prime is 3408203. The next prime is 3408241. The reversal of 3408221 is 1228043.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1228043 = 67 ⋅18329.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3408221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3408193 and 3408202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3408241) 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, 11135 + ... + 11436.

It is an arithmetic number, because the mean of its divisors is an integer number (857736).

Almost surely, 2^3408221 is an apocalyptic number.

It is an amenable number.

3408221 is a deficient number, since it is larger than the sum of its proper divisors (22723).

3408221 is a wasteful number, since it uses less digits than its factorization.

3408221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22722.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 3408221 is about 1846.1367771647. The cubic root of 3408221 is about 150.4905569069.

The spelling of 3408221 in words is "three million, four hundred eight thousand, two hundred twenty-one".