204121249 has 2 divisors, whose sum is σ = 204121250. Its totient is φ = 204121248.

The previous prime is 204121243. The next prime is 204121259. The reversal of 204121249 is 942121402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145323025 + 58798224 = 12055^2 + 7668^2 .

It is a cyclic number.

It is not a de Polignac number, because 204121249 - 2³ = 204121241 is a prime.

It is not a weakly prime, because it can be changed into another prime (204121241) 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 as a sum of consecutive naturals, namely, 102060624 + 102060625.

It is an arithmetic number, because the mean of its divisors is an integer number (102060625).

Almost surely, 2^204121249 is an apocalyptic number.

It is an amenable number.

204121249 is a deficient number, since it is larger than the sum of its proper divisors (1).

204121249 is an equidigital number, since it uses as much as digits as its factorization.

204121249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 204121249 is about 14287.1007905733. The cubic root of 204121249 is about 588.7931367609.

The spelling of 204121249 in words is "two hundred four million, one hundred twenty-one thousand, two hundred forty-nine".