242455 has 4 divisors (see below), whose sum is σ = 290952. Its totient is φ = 193960.

The previous prime is 242453. The next prime is 242467. The reversal of 242455 is 554242.

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

It is not a de Polignac number, because 242455 - 2¹ = 242453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242453) 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, 24241 + ... + 24250.

It is an arithmetic number, because the mean of its divisors is an integer number (72738).

2²⁴²⁴⁵⁵ is an apocalyptic number.

242455 is a deficient number, since it is larger than the sum of its proper divisors (48497).

242455 is an equidigital number, since it uses as much as digits as its factorization.

242455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48496.

The product of its digits is 1600, while the sum is 22.

The square root of 242455 is about 492.3971973925. The cubic root of 242455 is about 62.3558276852.

Adding to 242455 its reverse (554242), we get a palindrome (796697).

The spelling of 242455 in words is "two hundred forty-two thousand, four hundred fifty-five".