242712145 has 16 divisors (see below), whose sum is σ = 332110800. Its totient is φ = 168689664.

The previous prime is 242712143. The next prime is 242712149. The reversal of 242712145 is 541217242.

It can be written as a sum of positive squares in 8 ways, for example, as 11641744 + 231070401 = 3412^2 + 15201^2 .

It is not a de Polignac number, because 242712145 - 2¹ = 242712143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (242712143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108720 + ... + 110929.

It is an arithmetic number, because the mean of its divisors is an integer number (20756925).

Almost surely, 2^242712145 is an apocalyptic number.

It is an amenable number.

242712145 is a deficient number, since it is larger than the sum of its proper divisors (89398655).

242712145 is a wasteful number, since it uses less digits than its factorization.

242712145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219684.

The product of its digits is 4480, while the sum is 28.

The square root of 242712145 is about 15579.2215787568. The cubic root of 242712145 is about 623.7786452227.

Adding to 242712145 its reverse (541217242), we get a palindrome (783929387).

The spelling of 242712145 in words is "two hundred forty-two million, seven hundred twelve thousand, one hundred forty-five".