242589 has 4 divisors (see below), whose sum is σ = 323456. Its totient is φ = 161724.

The previous prime is 242551. The next prime is 242591. The reversal of 242589 is 985242.

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 not a de Polignac number, because 242589 - 2¹⁵ = 209821 is a prime.

It is an Ulam number.

It is a D-number.

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 242589.

It is not an unprimeable number, because it can be changed into a prime (242509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40429 + ... + 40434.

It is an arithmetic number, because the mean of its divisors is an integer number (80864).

2²⁴²⁵⁸⁹ is an apocalyptic number.

It is an amenable number.

242589 is a deficient number, since it is larger than the sum of its proper divisors (80867).

242589 is an equidigital number, since it uses as much as digits as its factorization.

242589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80866.

The product of its digits is 5760, while the sum is 30.

The square root of 242589 is about 492.5332476087. The cubic root of 242589 is about 62.3673131733.

The spelling of 242589 in words is "two hundred forty-two thousand, five hundred eighty-nine".