243135 has 16 divisors (see below), whose sum is σ = 432480. Its totient is φ = 129600.

The previous prime is 243121. The next prime is 243137. The reversal of 243135 is 531342.

243135 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 243135 - 2⁴ = 243119 is a prime.

It is a super-2 number, since 2×243135² = 118229256450, which contains 22 as substring.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

243135 is strictly pandigital in base 7.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 766 + ... + 1035.

It is an arithmetic number, because the mean of its divisors is an integer number (27030).

2²⁴³¹³⁵ is an apocalyptic number.

243135 is a deficient number, since it is larger than the sum of its proper divisors (189345).

243135 is a wasteful number, since it uses less digits than its factorization.

243135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1815 (or 1809 counting only the distinct ones).

The product of its digits is 360, while the sum is 18.

The square root of 243135 is about 493.0872133812. The cubic root of 243135 is about 62.4140685735.

Adding to 243135 its reverse (531342), we get a palindrome (774477).

It can be divided in two parts, 243 and 135, that added together give a triangular number (378 = T₂₇).

The spelling of 243135 in words is "two hundred forty-three thousand, one hundred thirty-five".