243142105 has 8 divisors (see below), whose sum is σ = 292003272. Its totient is φ = 194358528.

The previous prime is 243142103. The next prime is 243142169. The reversal of 243142105 is 501241342.

It can be written as a sum of positive squares in 4 ways, for example, as 66145689 + 176996416 = 8133^2 + 13304^2 .

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 243142105 - 2¹ = 243142103 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243142103) 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 7 ways as a sum of consecutive naturals, for example, 12262 + ... + 25231.

It is an arithmetic number, because the mean of its divisors is an integer number (36500409).

Almost surely, 2^243142105 is an apocalyptic number.

It is an amenable number.

243142105 is a deficient number, since it is larger than the sum of its proper divisors (48861167).

243142105 is a wasteful number, since it uses less digits than its factorization.

243142105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38795.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 243142105 is about 15593.0146219389. The cubic root of 243142105 is about 624.1467653150.

Adding to 243142105 its reverse (501241342), we get a palindrome (744383447).

The spelling of 243142105 in words is "two hundred forty-three million, one hundred forty-two thousand, one hundred five".