242137 has 4 divisors (see below), whose sum is σ = 276736. Its totient is φ = 207540.

The previous prime is 242129. The next prime is 242147. The reversal of 242137 is 731242.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 242137 - 2³ = 242129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242147) 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, 17289 + ... + 17302.

It is an arithmetic number, because the mean of its divisors is an integer number (69184).

2²⁴²¹³⁷ is an apocalyptic number.

It is an amenable number.

242137 is a deficient number, since it is larger than the sum of its proper divisors (34599).

242137 is an equidigital number, since it uses as much as digits as its factorization.

242137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34598.

The product of its digits is 336, while the sum is 19.

The square root of 242137 is about 492.0741813995. The cubic root of 242137 is about 62.3285541311.

Adding to 242137 its reverse (731242), we get a palindrome (973379).

The spelling of 242137 in words is "two hundred forty-two thousand, one hundred thirty-seven".