205407241 has 4 divisors (see below), whose sum is σ = 221207812. Its totient is φ = 189606672.

The previous prime is 205407217. The next prime is 205407247. The reversal of 205407241 is 142704502.

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 52142841 + 153264400 = 7221^2 + 12380^2 .

It is a cyclic number.

It is not a de Polignac number, because 205407241 - 2²⁷ = 71189513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205407247) 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, 7900266 + ... + 7900291.

It is an arithmetic number, because the mean of its divisors is an integer number (55301953).

Almost surely, 2^205407241 is an apocalyptic number.

It is an amenable number.

205407241 is a deficient number, since it is larger than the sum of its proper divisors (15800571).

205407241 is a wasteful number, since it uses less digits than its factorization.

205407241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15800570.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 205407241 is about 14332.0354800007. The cubic root of 205407241 is about 590.0270417559.

The spelling of 205407241 in words is "two hundred five million, four hundred seven thousand, two hundred forty-one".