242881 has 4 divisors (see below), whose sum is σ = 245700. Its totient is φ = 240064.

The previous prime is 242873. The next prime is 242887. The reversal of 242881 is 188242.

242881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 188242 = 2 ⋅94121.

It can be written as a sum of positive squares in 2 ways, for example, as 152881 + 90000 = 391^2 + 300^2 .

It is a cyclic number.

It is not a de Polignac number, because 242881 - 2³ = 242873 is a prime.

It is a super-2 number, since 2×242881² = 117982360322, which contains 22 as substring.

It is a Duffinian number.

242881 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (242887) 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, 1276 + ... + 1453.

It is an arithmetic number, because the mean of its divisors is an integer number (61425).

2²⁴²⁸⁸¹ is an apocalyptic number.

It is an amenable number.

242881 is a deficient number, since it is larger than the sum of its proper divisors (2819).

242881 is an equidigital number, since it uses as much as digits as its factorization.

242881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2818.

The product of its digits is 1024, while the sum is 25.

The square root of 242881 is about 492.8295851509. The cubic root of 242881 is about 62.3923266096.

The spelling of 242881 in words is "two hundred forty-two thousand, eight hundred eighty-one".