243125 has 10 divisors (see below), whose sum is σ = 304590. Its totient is φ = 194000.

The previous prime is 243121. The next prime is 243137. The reversal of 243125 is 521342.

It can be written as a sum of positive squares in 5 ways, for example, as 128881 + 114244 = 359^2 + 338^2 .

It is not a de Polignac number, because 243125 - 2² = 243121 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 243125.

It is not an unprimeable number, because it can be changed into a prime (243121) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 431 + ... + 819.

It is an arithmetic number, because the mean of its divisors is an integer number (30459).

2²⁴³¹²⁵ is an apocalyptic number.

243125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243125 is a deficient number, since it is larger than the sum of its proper divisors (61465).

243125 is an frugal number, since it uses more digits than its factorization.

243125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409 (or 394 counting only the distinct ones).

The product of its digits is 240, while the sum is 17.

The square root of 243125 is about 493.0770730829. The cubic root of 243125 is about 62.4132128770.

Adding to 243125 its reverse (521342), we get a palindrome (764467).

The spelling of 243125 in words is "two hundred forty-three thousand, one hundred twenty-five".