242189 has 4 divisors (see below), whose sum is σ = 244224. Its totient is φ = 240156.

The previous prime is 242173. The next prime is 242197. The reversal of 242189 is 981242.

242189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 242189 - 2⁴ = 242173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 827 + ... + 1080.

It is an arithmetic number, because the mean of its divisors is an integer number (61056).

2²⁴²¹⁸⁹ is an apocalyptic number.

It is an amenable number.

242189 is a deficient number, since it is larger than the sum of its proper divisors (2035).

242189 is a wasteful number, since it uses less digits than its factorization.

242189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034.

The product of its digits is 1152, while the sum is 26.

The square root of 242189 is about 492.1270161249. The cubic root of 242189 is about 62.3330155900. Note that the first 3 decimals are identical.

The spelling of 242189 in words is "two hundred forty-two thousand, one hundred eighty-nine".