242140145 has 8 divisors (see below), whose sum is σ = 312919656. Its totient is φ = 178811136.

The previous prime is 242140141. The next prime is 242140153. The reversal of 242140145 is 541041242.

It can be written as a sum of positive squares in 4 ways, for example, as 14371681 + 227768464 = 3791^2 + 15092^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 242140145 - 2² = 242140141 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 242140145.

It is not an unprimeable number, because it can be changed into a prime (242140141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1862552 + ... + 1862681.

It is an arithmetic number, because the mean of its divisors is an integer number (39114957).

Almost surely, 2^242140145 is an apocalyptic number.

It is an amenable number.

242140145 is a deficient number, since it is larger than the sum of its proper divisors (70779511).

242140145 is a wasteful number, since it uses less digits than its factorization.

242140145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3725251.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 242140145 is about 15560.8529650530. The cubic root of 242140145 is about 623.2882398167.

Adding to 242140145 its reverse (541041242), we get a palindrome (783181387).

The spelling of 242140145 in words is "two hundred forty-two million, one hundred forty thousand, one hundred forty-five".