242845 has 8 divisors (see below), whose sum is σ = 308664. Its totient is φ = 182784.

The previous prime is 242819. The next prime is 242863. The reversal of 242845 is 548242.

242845 = T₂₉ + T₃₀ + ... + T₁₁₃.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 68121 + 174724 = 261^2 + 418^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 242845 - 2⁵ = 242813 is a prime.

It is a Duffinian number.

242845 is a lucky number.

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1344 + ... + 1513.

It is an arithmetic number, because the mean of its divisors is an integer number (38583).

2²⁴²⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

242845 is a deficient number, since it is larger than the sum of its proper divisors (65819).

242845 is a wasteful number, since it uses less digits than its factorization.

242845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2879.

The product of its digits is 2560, while the sum is 25.

The square root of 242845 is about 492.7930600161. The cubic root of 242845 is about 62.3892438451.

The spelling of 242845 in words is "two hundred forty-two thousand, eight hundred forty-five".