205127242 has 4 divisors (see below), whose sum is σ = 307690866. Its totient is φ = 102563620.

The previous prime is 205127227. The next prime is 205127291. The reversal of 205127242 is 242721502.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 171845881 + 33281361 = 13109^2 + 5769^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51281809 + ... + 51281812.

Almost surely, 2^205127242 is an apocalyptic number.

205127242 is a deficient number, since it is larger than the sum of its proper divisors (102563624).

205127242 is a wasteful number, since it uses less digits than its factorization.

205127242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102563623.

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

The square root of 205127242 is about 14322.2638573656. The cubic root of 205127242 is about 589.7588231923.

Adding to 205127242 its reverse (242721502), we get a palindrome (447848744).

The spelling of 205127242 in words is "two hundred five million, one hundred twenty-seven thousand, two hundred forty-two".