242137757 has 2 divisors, whose sum is σ = 242137758. Its totient is φ = 242137756.

The previous prime is 242137751. The next prime is 242137769. The reversal of 242137757 is 757731242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188760121 + 53377636 = 13739^2 + 7306^2 .

It is a cyclic number.

It is not a de Polignac number, because 242137757 - 2⁴ = 242137741 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 242137757.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242137751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121068878 + 121068879.

It is an arithmetic number, because the mean of its divisors is an integer number (121068879).

Almost surely, 2^242137757 is an apocalyptic number.

It is an amenable number.

242137757 is a deficient number, since it is larger than the sum of its proper divisors (1).

242137757 is an equidigital number, since it uses as much as digits as its factorization.

242137757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82320, while the sum is 38.

The square root of 242137757 is about 15560.7762338516. The cubic root of 242137757 is about 623.2861908418.

Adding to 242137757 its reverse (757731242), we get a palindrome (999868999).

The spelling of 242137757 in words is "two hundred forty-two million, one hundred thirty-seven thousand, seven hundred fifty-seven".