3409205 has 4 divisors (see below), whose sum is σ = 4091052. Its totient is φ = 2727360.

The previous prime is 3409201. The next prime is 3409213. The reversal of 3409205 is 5029043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5029043 = 73 ⋅68891.

It can be written as a sum of positive squares in 2 ways, for example, as 1661521 + 1747684 = 1289^2 + 1322^2 .

It is not a de Polignac number, because 3409205 - 2² = 3409201 is a prime.

It is a super-3 number, since 3×3409205³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3409201) 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, 340916 + ... + 340925.

It is an arithmetic number, because the mean of its divisors is an integer number (1022763).

Almost surely, 2^3409205 is an apocalyptic number.

It is an amenable number.

3409205 is a deficient number, since it is larger than the sum of its proper divisors (681847).

3409205 is an equidigital number, since it uses as much as digits as its factorization.

3409205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681846.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 3409205 is about 1846.4032603957. The cubic root of 3409205 is about 150.5050384071.

The spelling of 3409205 in words is "three million, four hundred nine thousand, two hundred five".