205462121 has 2 divisors, whose sum is σ = 205462122. Its totient is φ = 205462120.

The previous prime is 205462093. The next prime is 205462139. The reversal of 205462121 is 121264502.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197683600 + 7778521 = 14060^2 + 2789^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205462121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (205462171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102731060 + 102731061.

It is an arithmetic number, because the mean of its divisors is an integer number (102731061).

Almost surely, 2^205462121 is an apocalyptic number.

It is an amenable number.

205462121 is a deficient number, since it is larger than the sum of its proper divisors (1).

205462121 is an equidigital number, since it uses as much as digits as its factorization.

205462121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 205462121 is about 14333.9499441012. The cubic root of 205462121 is about 590.0795842085.

The spelling of 205462121 in words is "two hundred five million, four hundred sixty-two thousand, one hundred twenty-one".