205041245 has 4 divisors (see below), whose sum is σ = 246049500. Its totient is φ = 164032992.

The previous prime is 205041229. The next prime is 205041269. The reversal of 205041245 is 542140502.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 81342361 + 123698884 = 9019^2 + 11122^2 .

It is a cyclic number.

It is not a de Polignac number, because 205041245 - 2⁴ = 205041229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 205041245.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20504120 + ... + 20504129.

It is an arithmetic number, because the mean of its divisors is an integer number (61512375).

Almost surely, 2^205041245 is an apocalyptic number.

It is an amenable number.

205041245 is a deficient number, since it is larger than the sum of its proper divisors (41008255).

205041245 is an equidigital number, since it uses as much as digits as its factorization.

205041245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41008254.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 205041245 is about 14319.2613287139. The cubic root of 205041245 is about 589.6763953649.

Adding to 205041245 its reverse (542140502), we get a palindrome (747181747).

The spelling of 205041245 in words is "two hundred five million, forty-one thousand, two hundred forty-five".