3205825 has 18 divisors (see below), whose sum is σ = 4626006. Its totient is φ = 2197440.

The previous prime is 3205793. The next prime is 3205837. The reversal of 3205825 is 5285023.

It can be written as a sum of positive squares in 3 ways, for example, as 919681 + 2286144 = 959^2 + 1512^2 .

It is not a de Polignac number, because 3205825 - 2⁵ = 3205793 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an Ulam number.

3205825 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3205825.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 84 + ... + 2533.

Almost surely, 2^3205825 is an apocalyptic number.

3205825 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3205825 is a deficient number, since it is larger than the sum of its proper divisors (1420181).

3205825 is a wasteful number, since it uses less digits than its factorization.

3205825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2641 (or 2629 counting only the distinct ones).

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

The square root of 3205825 is about 1790.4817787400. The cubic root of 3205825 is about 147.4506202608.

The spelling of 3205825 in words is "three million, two hundred five thousand, eight hundred twenty-five".