204245641 has 4 divisors (see below), whose sum is σ = 209227284. Its totient is φ = 199264000.

The previous prime is 204245609. The next prime is 204245647. The reversal of 204245641 is 146542402.

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 108597241 + 95648400 = 10421^2 + 9780^2 .

It is a cyclic number.

It is not a de Polignac number, because 204245641 - 2⁵ = 204245609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204245647) 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 3 ways as a sum of consecutive naturals, for example, 2490760 + ... + 2490841.

It is an arithmetic number, because the mean of its divisors is an integer number (52306821).

Almost surely, 2^204245641 is an apocalyptic number.

It is an amenable number.

204245641 is a deficient number, since it is larger than the sum of its proper divisors (4981643).

204245641 is an equidigital number, since it uses as much as digits as its factorization.

204245641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4981642.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 204245641 is about 14291.4534250369. The cubic root of 204245641 is about 588.9127164772.

The spelling of 204245641 in words is "two hundred four million, two hundred forty-five thousand, six hundred forty-one".