243801 has 12 divisors (see below), whose sum is σ = 356928. Its totient is φ = 160344.

The previous prime is 243799. The next prime is 243809. The reversal of 243801 is 108342.

It is a happy number.

It is not a de Polignac number, because 243801 - 2¹ = 243799 is a prime.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

243801 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 243801.

It is not an unprimeable number, because it can be changed into a prime (243809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 796 + ... + 1058.

It is an arithmetic number, because the mean of its divisors is an integer number (29744).

2²⁴³⁸⁰¹ is an apocalyptic number.

It is an amenable number.

243801 is a deficient number, since it is larger than the sum of its proper divisors (113127).

243801 is a wasteful number, since it uses less digits than its factorization.

243801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372 (or 369 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 243801 is about 493.7620884596. The cubic root of 243801 is about 62.4710052176.

The spelling of 243801 in words is "two hundred forty-three thousand, eight hundred one".