242087 has 4 divisors (see below), whose sum is σ = 243360. Its totient is φ = 240816.

The previous prime is 242083. The next prime is 242093. The reversal of 242087 is 780242.

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 242087 - 2² = 242083 is a prime.

It is a super-3 number, since 3×242087³ = 42563336099257509, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 242087.

It is not an unprimeable number, because it can be changed into a prime (242083) 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, 287 + ... + 752.

It is an arithmetic number, because the mean of its divisors is an integer number (60840).

2²⁴²⁰⁸⁷ is an apocalyptic number.

242087 is a deficient number, since it is larger than the sum of its proper divisors (1273).

242087 is a wasteful number, since it uses less digits than its factorization.

242087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 242087 is about 492.0233734285. The cubic root of 242087 is about 62.3242636643.

Subtracting from 242087 its sum of digits (23), we obtain a square (242064 = 492²).

The spelling of 242087 in words is "two hundred forty-two thousand, eighty-seven".