242986 has 4 divisors (see below), whose sum is σ = 364482. Its totient is φ = 121492.

The previous prime is 242971. The next prime is 242989. The reversal of 242986 is 689242.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 689242 = 2 ⋅344621.

It can be written as a sum of positive squares in only one way, i.e., 164025 + 78961 = 405^2 + 281^2 .

It is not an unprimeable number, because it can be changed into a prime (242989) by changing a digit.

242986 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60745 + ... + 60748.

2²⁴²⁹⁸⁶ is an apocalyptic number.

242986 is a deficient number, since it is larger than the sum of its proper divisors (121496).

242986 is a wasteful number, since it uses less digits than its factorization.

242986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121495.

The product of its digits is 6912, while the sum is 31.

The square root of 242986 is about 492.9361013357. The cubic root of 242986 is about 62.4013162663.

The spelling of 242986 in words is "two hundred forty-two thousand, nine hundred eighty-six".