243501 has 8 divisors (see below), whose sum is σ = 338880. Its totient is φ = 155232.

The previous prime is 243487. The next prime is 243517. The reversal of 243501 is 105342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243501 - 2⁵ = 243469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243521) 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, 1696 + ... + 1833.

It is an arithmetic number, because the mean of its divisors is an integer number (42360).

2²⁴³⁵⁰¹ is an apocalyptic number.

It is an amenable number.

243501 is a deficient number, since it is larger than the sum of its proper divisors (95379).

243501 is a wasteful number, since it uses less digits than its factorization.

243501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3555.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 243501 is about 493.4582049171. The cubic root of 243501 is about 62.4453709312.

Adding to 243501 its reverse (105342), we get a palindrome (348843).

The spelling of 243501 in words is "two hundred forty-three thousand, five hundred one".