242859 has 4 divisors (see below), whose sum is σ = 323816. Its totient is φ = 161904.

The previous prime is 242819. The next prime is 242863. The reversal of 242859 is 958242.

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

It is not a de Polignac number, because 242859 - 2⁷ = 242731 is a prime.

It is a D-number.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (242819) 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, 40474 + ... + 40479.

It is an arithmetic number, because the mean of its divisors is an integer number (80954).

2²⁴²⁸⁵⁹ is an apocalyptic number.

242859 is a deficient number, since it is larger than the sum of its proper divisors (80957).

242859 is an equidigital number, since it uses as much as digits as its factorization.

242859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80956.

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

The square root of 242859 is about 492.8072645568. The cubic root of 242859 is about 62.3904427342.

The spelling of 242859 in words is "two hundred forty-two thousand, eight hundred fifty-nine".