242157 has 8 divisors (see below), whose sum is σ = 329184. Its totient is φ = 158288.

The previous prime is 242147. The next prime is 242161. The reversal of 242157 is 751242.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 242157 - 2⁶ = 242093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 603 + ... + 920.

It is an arithmetic number, because the mean of its divisors is an integer number (41148).

2²⁴²¹⁵⁷ is an apocalyptic number.

It is an amenable number.

242157 is a deficient number, since it is larger than the sum of its proper divisors (87027).

242157 is a wasteful number, since it uses less digits than its factorization.

242157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1579.

The product of its digits is 560, while the sum is 21.

The square root of 242157 is about 492.0945031191. The cubic root of 242157 is about 62.3302701524.

Adding to 242157 its reverse (751242), we get a palindrome (993399).

The spelling of 242157 in words is "two hundred forty-two thousand, one hundred fifty-seven".