242156 has 6 divisors (see below), whose sum is σ = 423780. Its totient is φ = 121076.

The previous prime is 242147. The next prime is 242161. The reversal of 242156 is 651242.

It is a happy number.

242156 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

242156 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30266 + ... + 30273.

It is an arithmetic number, because the mean of its divisors is an integer number (70630).

2²⁴²¹⁵⁶ is an apocalyptic number.

It is an amenable number.

242156 is a deficient number, since it is larger than the sum of its proper divisors (181624).

242156 is a wasteful number, since it uses less digits than its factorization.

242156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60543 (or 60541 counting only the distinct ones).

The product of its digits is 480, while the sum is 20.

The square root of 242156 is about 492.0934870530. The cubic root of 242156 is about 62.3301843536.

Adding to 242156 its reverse (651242), we get a palindrome (893398).

The spelling of 242156 in words is "two hundred forty-two thousand, one hundred fifty-six".