243042001 has 8 divisors (see below), whose sum is σ = 246070440. Its totient is φ = 240020352.

The previous prime is 243041983. The next prime is 243042089. The reversal of 243042001 is 100240342.

It can be written as a sum of positive squares in 4 ways, for example, as 12609601 + 230432400 = 3551^2 + 15180^2 .

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 243042001 - 2²⁵ = 209487569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243042101) 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, 142711 + ... + 144403.

It is an arithmetic number, because the mean of its divisors is an integer number (30758805).

Almost surely, 2^243042001 is an apocalyptic number.

It is an amenable number.

243042001 is a deficient number, since it is larger than the sum of its proper divisors (3028439).

243042001 is a wasteful number, since it uses less digits than its factorization.

243042001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3395.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 243042001 is about 15589.8043926151. The cubic root of 243042001 is about 624.0610977664.

Adding to 243042001 its reverse (100240342), we get a palindrome (343282343).

The spelling of 243042001 in words is "two hundred forty-three million, forty-two thousand, one".