3421665 has 24 divisors (see below), whose sum is σ = 6388200. Its totient is φ = 1684224.

The previous prime is 3421661. The next prime is 3421667. The reversal of 3421665 is 5661243.

3421665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6561 + 3415104 = 81^2 + 1848^2 .

It is not a de Polignac number, because 3421665 - 2² = 3421661 is a prime.

It is a d-powerful number, because it can be written as 3¹⁰ + 4⁴ + 2 + 1 + 6⁸ + 6⁸ + 5⁵ .

It is not an unprimeable number, because it can be changed into a prime (3421661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2340 + ... + 3509.

It is an arithmetic number, because the mean of its divisors is an integer number (266175).

Almost surely, 2^3421665 is an apocalyptic number.

It is an amenable number.

3421665 is a deficient number, since it is larger than the sum of its proper divisors (2966535).

3421665 is a wasteful number, since it uses less digits than its factorization.

3421665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5873 (or 5870 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 3421665 is about 1849.7743105579. The cubic root of 3421665 is about 150.6881713068.

The spelling of 3421665 in words is "three million, four hundred twenty-one thousand, six hundred sixty-five".