242444021 has 4 divisors (see below), whose sum is σ = 256705452. Its totient is φ = 228182592.

The previous prime is 242444011. The next prime is 242444107. The reversal of 242444021 is 120444242.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 141943396 + 100500625 = 11914^2 + 10025^2 .

It is a cyclic number.

It is not a de Polignac number, because 242444021 - 2¹⁰ = 242442997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242444011) 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, 7130690 + ... + 7130723.

It is an arithmetic number, because the mean of its divisors is an integer number (64176363).

Almost surely, 2^242444021 is an apocalyptic number.

It is an amenable number.

242444021 is a deficient number, since it is larger than the sum of its proper divisors (14261431).

242444021 is a wasteful number, since it uses less digits than its factorization.

242444021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14261430.

The product of its (nonzero) digits is 2048, while the sum is 23.

The square root of 242444021 is about 15570.6140212902. The cubic root of 242444021 is about 623.5488645906.

Adding to 242444021 its reverse (120444242), we get a palindrome (362888263).

The spelling of 242444021 in words is "two hundred forty-two million, four hundred forty-four thousand, twenty-one".