242140523 has 2 divisors, whose sum is σ = 242140524. Its totient is φ = 242140522.

The previous prime is 242140511. The next prime is 242140529. The reversal of 242140523 is 325041242.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242140523 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (242140529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121070261 + 121070262.

It is an arithmetic number, because the mean of its divisors is an integer number (121070262).

Almost surely, 2^242140523 is an apocalyptic number.

242140523 is a deficient number, since it is larger than the sum of its proper divisors (1).

242140523 is an equidigital number, since it uses as much as digits as its factorization.

242140523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 242140523 is about 15560.8651109121. The cubic root of 242140523 is about 623.2885641507.

Adding to 242140523 its reverse (325041242), we get a palindrome (567181765).

The spelling of 242140523 in words is "two hundred forty-two million, one hundred forty thousand, five hundred twenty-three".