242745157 has 2 divisors, whose sum is σ = 242745158. Its totient is φ = 242745156.

The previous prime is 242745149. The next prime is 242745187. The reversal of 242745157 is 751547242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140209281 + 102535876 = 11841^2 + 10126^2 .

It is a cyclic number.

It is not a de Polignac number, because 242745157 - 2³ = 242745149 is a prime.

It is a super-2 number, since 2×242745157² = 117850422493909298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242745127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121372578 + 121372579.

It is an arithmetic number, because the mean of its divisors is an integer number (121372579).

Almost surely, 2^242745157 is an apocalyptic number.

It is an amenable number.

242745157 is a deficient number, since it is larger than the sum of its proper divisors (1).

242745157 is an equidigital number, since it uses as much as digits as its factorization.

242745157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78400, while the sum is 37.

The square root of 242745157 is about 15580.2810308415. The cubic root of 242745157 is about 623.8069246029.

The spelling of 242745157 in words is "two hundred forty-two million, seven hundred forty-five thousand, one hundred fifty-seven".