243604 has 6 divisors (see below), whose sum is σ = 426314. Its totient is φ = 121800.

The previous prime is 243589. The next prime is 243613. The reversal of 243604 is 406342.

243604 = T₃₄₇ + T₃₄₈ + ... + T₃₅₀.

It can be written as a sum of positive squares in only one way, i.e., 122500 + 121104 = 350^2 + 348^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30447 + ... + 30454.

2²⁴³⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

243604 is a deficient number, since it is larger than the sum of its proper divisors (182710).

243604 is a wasteful number, since it uses less digits than its factorization.

243604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60905 (or 60903 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 243604 is about 493.5625593580. The cubic root of 243604 is about 62.4541744085.

Adding to 243604 its reverse (406342), we get a palindrome (649946).

The spelling of 243604 in words is "two hundred forty-three thousand, six hundred four".