242665157 has 16 divisors (see below), whose sum is σ = 306415872. Its totient is φ = 187249920.

The previous prime is 242665153. The next prime is 242665187. The reversal of 242665157 is 751566242.

It is a cyclic number.

It is not a de Polignac number, because 242665157 - 2² = 242665153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 242665157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242665153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41594 + ... + 47067.

It is an arithmetic number, because the mean of its divisors is an integer number (19150992).

Almost surely, 2^242665157 is an apocalyptic number.

It is an amenable number.

242665157 is a deficient number, since it is larger than the sum of its proper divisors (63750715).

242665157 is a wasteful number, since it uses less digits than its factorization.

242665157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88708.

The product of its digits is 100800, while the sum is 38.

The square root of 242665157 is about 15577.7134714951. The cubic root of 242665157 is about 623.7383890273.

The spelling of 242665157 in words is "two hundred forty-two million, six hundred sixty-five thousand, one hundred fifty-seven".