3205285 has 4 divisors (see below), whose sum is σ = 3846348. Its totient is φ = 2564224.

The previous prime is 3205261. The next prime is 3205289. The reversal of 3205285 is 5825023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5825023 = 83 ⋅70181.

It can be written as a sum of positive squares in 2 ways, for example, as 2125764 + 1079521 = 1458^2 + 1039^2 .

It is a cyclic number.

It is not a de Polignac number, because 3205285 - 2⁵ = 3205253 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3205289) 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, 320524 + ... + 320533.

It is an arithmetic number, because the mean of its divisors is an integer number (961587).

Almost surely, 2^3205285 is an apocalyptic number.

It is an amenable number.

3205285 is a deficient number, since it is larger than the sum of its proper divisors (641063).

3205285 is an equidigital number, since it uses as much as digits as its factorization.

3205285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641062.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 3205285 is about 1790.3309749876. The cubic root of 3205285 is about 147.4423407689.

The spelling of 3205285 in words is "three million, two hundred five thousand, two hundred eighty-five".