205604245 has 96 divisors (see below), whose sum is σ = 340402176. Its totient is φ = 117532800.

The previous prime is 205604219. The next prime is 205604249. The reversal of 205604245 is 542406502.

It is not a de Polignac number, because 205604245 - 2¹⁹ = 205079957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205604249) 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 95 ways as a sum of consecutive naturals, for example, 1921482 + ... + 1921588.

It is an arithmetic number, because the mean of its divisors is an integer number (3545856).

Almost surely, 2^205604245 is an apocalyptic number.

It is an amenable number.

205604245 is a deficient number, since it is larger than the sum of its proper divisors (134797931).

205604245 is a wasteful number, since it uses less digits than its factorization.

205604245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 184 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 205604245 is about 14338.9066877499. The cubic root of 205604245 is about 590.2156111328.

It can be divided in two parts, 205 and 604245, that added together give a triangular number (604450 = T₁₀₉₉).

The spelling of 205604245 in words is "two hundred five million, six hundred four thousand, two hundred forty-five".