242558 has 8 divisors (see below), whose sum is σ = 379728. Its totient is φ = 115984.

The previous prime is 242551. The next prime is 242591. The reversal of 242558 is 855242.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2591 + ... + 2682.

It is an arithmetic number, because the mean of its divisors is an integer number (47466).

2²⁴²⁵⁵⁸ is an apocalyptic number.

242558 is a deficient number, since it is larger than the sum of its proper divisors (137170).

242558 is a wasteful number, since it uses less digits than its factorization.

242558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5298.

The product of its digits is 3200, while the sum is 26.

The square root of 242558 is about 492.5017766465. The cubic root of 242558 is about 62.3646564589.

The spelling of 242558 in words is "two hundred forty-two thousand, five hundred fifty-eight".