243525 has 24 divisors (see below), whose sum is σ = 428544. Its totient is φ = 121600.

The previous prime is 243521. The next prime is 243527. The reversal of 243525 is 525342.

It is not a de Polignac number, because 243525 - 2² = 243521 is a prime.

It is a d-powerful number, because it can be written as 2⁷ + 4³ + 5² + 3¹¹ + 2¹⁶ + 5⁴ .

It is a Curzon number.

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

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1180 + ... + 1370.

It is an arithmetic number, because the mean of its divisors is an integer number (17856).

2²⁴³⁵²⁵ is an apocalyptic number.

243525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243525 is a deficient number, since it is larger than the sum of its proper divisors (185019).

243525 is a wasteful number, since it uses less digits than its factorization.

243525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221 (or 216 counting only the distinct ones).

The product of its digits is 1200, while the sum is 21.

The square root of 243525 is about 493.4825224869. The cubic root of 243525 is about 62.4474224487.

Adding to 243525 its reverse (525342), we get a palindrome (768867).

The spelling of 243525 in words is "two hundred forty-three thousand, five hundred twenty-five".