242985157 has 2 divisors, whose sum is σ = 242985158. Its totient is φ = 242985156.

The previous prime is 242985151. The next prime is 242985209. The reversal of 242985157 is 751589242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199543876 + 43441281 = 14126^2 + 6591^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242985157 is a prime.

It is a super-3 number, since 3×242985157³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242985151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121492578 + 121492579.

It is an arithmetic number, because the mean of its divisors is an integer number (121492579).

Almost surely, 2^242985157 is an apocalyptic number.

It is an amenable number.

242985157 is a deficient number, since it is larger than the sum of its proper divisors (1).

242985157 is an equidigital number, since it uses as much as digits as its factorization.

242985157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201600, while the sum is 43.

The square root of 242985157 is about 15587.9811714025. The cubic root of 242985157 is about 624.0124410255.

The spelling of 242985157 in words is "two hundred forty-two million, nine hundred eighty-five thousand, one hundred fifty-seven".