3404821 has 16 divisors (see below), whose sum is σ = 4055040. Its totient is φ = 2798640.

The previous prime is 3404801. The next prime is 3404827. The reversal of 3404821 is 1284043.

It is a cyclic number.

It is not a de Polignac number, because 3404821 - 2⁹ = 3404309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3404792 and 3404801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3404827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25926 + ... + 26056.

It is an arithmetic number, because the mean of its divisors is an integer number (253440).

Almost surely, 2^3404821 is an apocalyptic number.

It is an amenable number.

3404821 is a deficient number, since it is larger than the sum of its proper divisors (650219).

3404821 is a wasteful number, since it uses less digits than its factorization.

3404821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 3404821 is about 1845.2157055477. The cubic root of 3404821 is about 150.4404977379.

Adding to 3404821 its reverse (1284043), we get a palindrome (4688864).

It can be divided in two parts, 3404 and 821, that added together give a square (4225 = 65²).

The spelling of 3404821 in words is "three million, four hundred four thousand, eight hundred twenty-one".