242754161 has 4 divisors (see below), whose sum is σ = 261427572. Its totient is φ = 224080752.

The previous prime is 242754139. The next prime is 242754173. The reversal of 242754161 is 161457242.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161457242 = 2 ⋅80728621.

It can be written as a sum of positive squares in 2 ways, for example, as 138203536 + 104550625 = 11756^2 + 10225^2 .

It is a cyclic number.

It is not a de Polignac number, because 242754161 - 2¹⁴ = 242737777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242754131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9336686 + ... + 9336711.

It is an arithmetic number, because the mean of its divisors is an integer number (65356893).

Almost surely, 2^242754161 is an apocalyptic number.

It is an amenable number.

242754161 is a deficient number, since it is larger than the sum of its proper divisors (18673411).

242754161 is a wasteful number, since it uses less digits than its factorization.

242754161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18673410.

The product of its digits is 13440, while the sum is 32.

The square root of 242754161 is about 15580.5699831553. The cubic root of 242754161 is about 623.8146373392.

The spelling of 242754161 in words is "two hundred forty-two million, seven hundred fifty-four thousand, one hundred sixty-one".