242241421 has 4 divisors (see below), whose sum is σ = 245653344. Its totient is φ = 238829500.

The previous prime is 242241397. The next prime is 242241427. The reversal of 242241421 is 124142242.

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 242241421 - 2¹¹ = 242239373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242241392 and 242241401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242241427) 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, 1705855 + ... + 1705996.

It is an arithmetic number, because the mean of its divisors is an integer number (61413336).

Almost surely, 2^242241421 is an apocalyptic number.

It is an amenable number.

242241421 is a deficient number, since it is larger than the sum of its proper divisors (3411923).

242241421 is an equidigital number, since it uses as much as digits as its factorization.

242241421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3411922.

The product of its digits is 1024, while the sum is 22.

The square root of 242241421 is about 15564.1068166471. The cubic root of 242241421 is about 623.3751252320.

Adding to 242241421 its reverse (124142242), we get a palindrome (366383663).

The spelling of 242241421 in words is "two hundred forty-two million, two hundred forty-one thousand, four hundred twenty-one".