242143505 has 8 divisors (see below), whose sum is σ = 305865600. Its totient is φ = 183519216.

The previous prime is 242143481. The next prime is 242143507. The reversal of 242143505 is 505341242.

It is a happy number.

242143505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 242143505 - 2¹⁸ = 241881361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (242143507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1274345 + ... + 1274534.

It is an arithmetic number, because the mean of its divisors is an integer number (38233200).

Almost surely, 2^242143505 is an apocalyptic number.

It is an amenable number.

242143505 is a deficient number, since it is larger than the sum of its proper divisors (63722095).

242143505 is a wasteful number, since it uses less digits than its factorization.

242143505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2548903.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 242143505 is about 15560.9609279119. The cubic root of 242143505 is about 623.2911227736.

Adding to 242143505 its reverse (505341242), we get a palindrome (747484747).

The spelling of 242143505 in words is "two hundred forty-two million, one hundred forty-three thousand, five hundred five".