242143421 has 16 divisors (see below), whose sum is σ = 265399680. Its totient is φ = 219585600.

The previous prime is 242143411. The next prime is 242143459. The reversal of 242143421 is 124341242.

It is not a de Polignac number, because 242143421 - 2¹⁴ = 242127037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242143411) 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 15 ways as a sum of consecutive naturals, for example, 185471 + ... + 186771.

It is an arithmetic number, because the mean of its divisors is an integer number (16587480).

Almost surely, 2^242143421 is an apocalyptic number.

It is an amenable number.

242143421 is a deficient number, since it is larger than the sum of its proper divisors (23256259).

242143421 is a wasteful number, since it uses less digits than its factorization.

242143421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556.

The product of its digits is 1536, while the sum is 23.

The square root of 242143421 is about 15560.9582288495. The cubic root of 242143421 is about 623.2910507000.

Adding to 242143421 its reverse (124341242), we get a palindrome (366484663).

The spelling of 242143421 in words is "two hundred forty-two million, one hundred forty-three thousand, four hundred twenty-one".