242106157 has 2 divisors, whose sum is σ = 242106158. Its totient is φ = 242106156.

The previous prime is 242106149. The next prime is 242106203. The reversal of 242106157 is 751601242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 229189321 + 12916836 = 15139^2 + 3594^2 .

It is a cyclic number.

It is not a de Polignac number, because 242106157 - 2³ = 242106149 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242106457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121053078 + 121053079.

It is an arithmetic number, because the mean of its divisors is an integer number (121053079).

Almost surely, 2^242106157 is an apocalyptic number.

It is an amenable number.

242106157 is a deficient number, since it is larger than the sum of its proper divisors (1).

242106157 is an equidigital number, since it uses as much as digits as its factorization.

242106157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 242106157 is about 15559.7608272107. The cubic root of 242106157 is about 623.2590758354.

Adding to 242106157 its reverse (751601242), we get a palindrome (993707399).

The spelling of 242106157 in words is "two hundred forty-two million, one hundred six thousand, one hundred fifty-seven".