3421205 has 8 divisors (see below), whose sum is σ = 4216632. Its totient is φ = 2662848.

The previous prime is 3421193. The next prime is 3421219. The reversal of 3421205 is 5021243.

It can be written as a sum of positive squares in 4 ways, for example, as 790321 + 2630884 = 889^2 + 1622^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3421205 - 2¹⁶ = 3355669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9062 + ... + 9431.

It is an arithmetic number, because the mean of its divisors is an integer number (527079).

Almost surely, 2^3421205 is an apocalyptic number.

It is an amenable number.

3421205 is a deficient number, since it is larger than the sum of its proper divisors (795427).

3421205 is a wasteful number, since it uses less digits than its factorization.

3421205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18535.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 3421205 is about 1849.6499668856. The cubic root of 3421205 is about 150.6814182918.

Adding to 3421205 its reverse (5021243), we get a palindrome (8442448).

The spelling of 3421205 in words is "three million, four hundred twenty-one thousand, two hundred five".