243654 has 8 divisors (see below), whose sum is σ = 487320. Its totient is φ = 81216.

The previous prime is 243647. The next prime is 243671. The reversal of 243654 is 456342.

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

243654 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 2¹⁷ + 4⁴ + 6⁶ + 3² + 5³ + 4⁸ .

It is a congruent number.

It is an unprimeable number.

243654 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20299 + ... + 20310.

It is an arithmetic number, because the mean of its divisors is an integer number (60915).

2²⁴³⁶⁵⁴ is an apocalyptic number.

243654 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243654 is a wasteful number, since it uses less digits than its factorization.

243654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40614.

The product of its digits is 2880, while the sum is 24.

The square root of 243654 is about 493.6132088994. The cubic root of 243654 is about 62.4584470464.

Adding to 243654 its reverse (456342), we get a palindrome (699996).

The spelling of 243654 in words is "two hundred forty-three thousand, six hundred fifty-four".