243142541 has 4 divisors (see below), whose sum is σ = 243182112. Its totient is φ = 243102972.

The previous prime is 243142507. The next prime is 243142547. The reversal of 243142541 is 145241342.

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 243142541 - 2⁶ = 243142477 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243142541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243142547) 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 3 ways as a sum of consecutive naturals, for example, 8375 + ... + 23588.

It is an arithmetic number, because the mean of its divisors is an integer number (60795528).

Almost surely, 2^243142541 is an apocalyptic number.

It is an amenable number.

243142541 is a deficient number, since it is larger than the sum of its proper divisors (39571).

243142541 is an equidigital number, since it uses as much as digits as its factorization.

243142541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39570.

The product of its digits is 3840, while the sum is 26.

The square root of 243142541 is about 15593.0286025518. The cubic root of 243142541 is about 624.1471383860.

Adding to 243142541 its reverse (145241342), we get a palindrome (388383883).

The spelling of 243142541 in words is "two hundred forty-three million, one hundred forty-two thousand, five hundred forty-one".