242542105 has 8 divisors (see below), whose sum is σ = 313439112. Its totient is φ = 179107968.

The previous prime is 242542103. The next prime is 242542117. The reversal of 242542105 is 501245242.

It can be written as a sum of positive squares in 4 ways, for example, as 2509056 + 240033049 = 1584^2 + 15493^2 .

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

It is not a de Polignac number, because 242542105 - 2¹ = 242542103 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 242542105.

It is not an unprimeable number, because it can be changed into a prime (242542103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1865644 + ... + 1865773.

It is an arithmetic number, because the mean of its divisors is an integer number (39179889).

Almost surely, 2^242542105 is an apocalyptic number.

It is an amenable number.

242542105 is a deficient number, since it is larger than the sum of its proper divisors (70897007).

242542105 is a wasteful number, since it uses less digits than its factorization.

242542105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3731435.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 242542105 is about 15573.7633537947. The cubic root of 242542105 is about 623.6329416223.

Adding to 242542105 its reverse (501245242), we get a palindrome (743787347).

The spelling of 242542105 in words is "two hundred forty-two million, five hundred forty-two thousand, one hundred five".