242742561 has 8 divisors (see below), whose sum is σ = 323770944. Its totient is φ = 161771280.

The previous prime is 242742553. The next prime is 242742569. The reversal of 242742561 is 165247242.

It is an interprime number because it is at equal distance from previous prime (242742553) and next prime (242742569).

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

It is not a de Polignac number, because 242742561 - 2³ = 242742553 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (242742569) 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, 3106 + ... + 22251.

It is an arithmetic number, because the mean of its divisors is an integer number (40471368).

Almost surely, 2^242742561 is an apocalyptic number.

It is an amenable number.

242742561 is a deficient number, since it is larger than the sum of its proper divisors (81028383).

242742561 is a wasteful number, since it uses less digits than its factorization.

242742561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28551.

The product of its digits is 26880, while the sum is 33.

The square root of 242742561 is about 15580.1977201831. The cubic root of 242742561 is about 623.8047008599.

The spelling of 242742561 in words is "two hundred forty-two million, seven hundred forty-two thousand, five hundred sixty-one".