242686 has 4 divisors (see below), whose sum is σ = 364032. Its totient is φ = 121342.

The previous prime is 242681. The next prime is 242689. The reversal of 242686 is 686242.

242686 is digitally balanced in base 3, 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.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60670 + ... + 60673.

It is an arithmetic number, because the mean of its divisors is an integer number (91008).

2²⁴²⁶⁸⁶ is an apocalyptic number.

242686 is a deficient number, since it is larger than the sum of its proper divisors (121346).

242686 is a wasteful number, since it uses less digits than its factorization.

242686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121345.

The product of its digits is 4608, while the sum is 28.

The square root of 242686 is about 492.6317082771. The cubic root of 242686 is about 62.3756246566.

Subtracting 242686 from its reverse (686242), we obtain a square (443556 = 666²).

The spelling of 242686 in words is "two hundred forty-two thousand, six hundred eighty-six".