242252561 has 4 divisors (see below), whose sum is σ = 242291124. Its totient is φ = 242214000.

The previous prime is 242252531. The next prime is 242252581. The reversal of 242252561 is 165252242.

242252561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 165252242 = 2 ⋅82626121.

It can be written as a sum of positive squares in 2 ways, for example, as 216648961 + 25603600 = 14719^2 + 5060^2 .

It is a cyclic number.

It is not a de Polignac number, because 242252561 - 2¹⁴ = 242236177 is a prime.

It is a super-2 number, since 2×242252561² = 117372606622117442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242252531) 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, 7430 + ... + 23231.

It is an arithmetic number, because the mean of its divisors is an integer number (60572781).

Almost surely, 2^242252561 is an apocalyptic number.

It is an amenable number.

242252561 is a deficient number, since it is larger than the sum of its proper divisors (38563).

242252561 is an equidigital number, since it uses as much as digits as its factorization.

242252561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38562.

The product of its digits is 9600, while the sum is 29.

The square root of 242252561 is about 15564.4646872290. The cubic root of 242252561 is about 623.3846808404.

The spelling of 242252561 in words is "two hundred forty-two million, two hundred fifty-two thousand, five hundred sixty-one".