243140 has 12 divisors (see below), whose sum is σ = 510636. Its totient is φ = 97248.

The previous prime is 243137. The next prime is 243149. The reversal of 243140 is 41342.

It can be written as a sum of positive squares in 2 ways, for example, as 42436 + 200704 = 206^2 + 448^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 243140.

It is not an unprimeable number, because it can be changed into a prime (243149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6059 + ... + 6098.

It is an arithmetic number, because the mean of its divisors is an integer number (42553).

2²⁴³¹⁴⁰ is an apocalyptic number.

243140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243140 is an abundant number, since it is smaller than the sum of its proper divisors (267496).

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

243140 is a wasteful number, since it uses less digits than its factorization.

243140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12166 (or 12164 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 243140 is about 493.0922834521. The cubic root of 243140 is about 62.4144964129.

Adding to 243140 its reverse (41342), we get a palindrome (284482).

It can be divided in two parts, 243 and 140, that added together give a palindrome (383).

The spelling of 243140 in words is "two hundred forty-three thousand, one hundred forty", and thus it is an iban number.