242539543 has 4 divisors (see below), whose sum is σ = 243506088. Its totient is φ = 241573000.

The previous prime is 242539537. The next prime is 242539547. The reversal of 242539543 is 345935242.

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

It is a cyclic number.

It is not a de Polignac number, because 242539543 - 2⁵ = 242539511 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 (242539547) 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, 482896 + ... + 483397.

It is an arithmetic number, because the mean of its divisors is an integer number (60876522).

Almost surely, 2^242539543 is an apocalyptic number.

242539543 is a deficient number, since it is larger than the sum of its proper divisors (966545).

242539543 is an equidigital number, since it uses as much as digits as its factorization.

242539543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966544.

The product of its digits is 129600, while the sum is 37.

The square root of 242539543 is about 15573.6810998556. The cubic root of 242539543 is about 623.6307457792.

The spelling of 242539543 in words is "two hundred forty-two million, five hundred thirty-nine thousand, five hundred forty-three".