242645761 has 4 divisors (see below), whose sum is σ = 242913024. Its totient is φ = 242378500.

The previous prime is 242645747. The next prime is 242645771. The reversal of 242645761 is 167546242.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 242645761 - 2⁷ = 242645633 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 242645761.

It is not an unprimeable number, because it can be changed into a prime (242645731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132265 + ... + 134086.

It is an arithmetic number, because the mean of its divisors is an integer number (60728256).

Almost surely, 2^242645761 is an apocalyptic number.

It is an amenable number.

242645761 is a deficient number, since it is larger than the sum of its proper divisors (267263).

242645761 is an equidigital number, since it uses as much as digits as its factorization.

242645761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267262.

The product of its digits is 80640, while the sum is 37.

The square root of 242645761 is about 15577.0909029896. The cubic root of 242645761 is about 623.7217703083.

The spelling of 242645761 in words is "two hundred forty-two million, six hundred forty-five thousand, seven hundred sixty-one".