3406921 has 12 divisors (see below), whose sum is σ = 4136832. Its totient is φ = 2792328.

The previous prime is 3406913. The next prime is 3406937. The reversal of 3406921 is 1296043.

It is not a de Polignac number, because 3406921 - 2³ = 3406913 is a prime.

It is a super-2 number, since 2×3406921² = 23214221400482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3406961) 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 11 ways as a sum of consecutive naturals, for example, 385 + ... + 2638.

It is an arithmetic number, because the mean of its divisors is an integer number (344736).

Almost surely, 2^3406921 is an apocalyptic number.

It is an amenable number.

3406921 is a deficient number, since it is larger than the sum of its proper divisors (729911).

3406921 is a wasteful number, since it uses less digits than its factorization.

3406921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3060 (or 3053 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 3406921 is about 1845.7846569955. The cubic root of 3406921 is about 150.4714205692.

The spelling of 3406921 in words is "three million, four hundred six thousand, nine hundred twenty-one".