242440143 has 16 divisors (see below), whose sum is σ = 352999296. Its totient is φ = 146783840.

The previous prime is 242440139. The next prime is 242440207. The reversal of 242440143 is 341044242.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 242440143 - 2² = 242440139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242440343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35221 + ... + 41537.

It is an arithmetic number, because the mean of its divisors is an integer number (22062456).

Almost surely, 2^242440143 is an apocalyptic number.

242440143 is a deficient number, since it is larger than the sum of its proper divisors (110559153).

242440143 is a wasteful number, since it uses less digits than its factorization.

242440143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7494.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 242440143 is about 15570.4894913423. The cubic root of 242440143 is about 623.5455399257.

Adding to 242440143 its reverse (341044242), we get a palindrome (583484385).

The spelling of 242440143 in words is "two hundred forty-two million, four hundred forty thousand, one hundred forty-three".