204042541 has 2 divisors, whose sum is σ = 204042542. Its totient is φ = 204042540.

The previous prime is 204042533. The next prime is 204042571. The reversal of 204042541 is 145240402.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192793225 + 11249316 = 13885^2 + 3354^2 .

It is a cyclic number.

It is not a de Polignac number, because 204042541 - 2³ = 204042533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204042571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102021270 + 102021271.

It is an arithmetic number, because the mean of its divisors is an integer number (102021271).

Almost surely, 2^204042541 is an apocalyptic number.

It is an amenable number.

204042541 is a deficient number, since it is larger than the sum of its proper divisors (1).

204042541 is an equidigital number, since it uses as much as digits as its factorization.

204042541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 204042541 is about 14284.3460123311. The cubic root of 204042541 is about 588.7174485965.

Adding to 204042541 its reverse (145240402), we get a palindrome (349282943).

The spelling of 204042541 in words is "two hundred four million, forty-two thousand, five hundred forty-one".