242387 has 4 divisors (see below), whose sum is σ = 248976. Its totient is φ = 235800.

The previous prime is 242377. The next prime is 242393. The reversal of 242387 is 783242.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 242387 - 2⁴ = 242371 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (242357) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 3239 + ... + 3312.

It is an arithmetic number, because the mean of its divisors is an integer number (62244).

2²⁴²³⁸⁷ is an apocalyptic number.

242387 is a deficient number, since it is larger than the sum of its proper divisors (6589).

242387 is an equidigital number, since it uses as much as digits as its factorization.

242387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6588.

The product of its digits is 2688, while the sum is 26.

The square root of 242387 is about 492.3281426041. The cubic root of 242387 is about 62.3499976099.

The spelling of 242387 in words is "two hundred forty-two thousand, three hundred eighty-seven".