243534 has 16 divisors (see below), whose sum is σ = 500688. Its totient is φ = 78912.

The previous prime is 243533. The next prime is 243539. The reversal of 243534 is 435342.

It is a happy number.

It is a super-3 number, since 3×243534³ = 43331134586991912, which contains 333 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 243534.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 327 + ... + 770.

It is an arithmetic number, because the mean of its divisors is an integer number (31293).

2²⁴³⁵³⁴ is an apocalyptic number.

243534 is an abundant number, since it is smaller than the sum of its proper divisors (257154).

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

243534 is a wasteful number, since it uses less digits than its factorization.

243534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139.

The product of its digits is 1440, while the sum is 21.

The square root of 243534 is about 493.4916412666. The cubic root of 243534 is about 62.4481917330.

Adding to 243534 its reverse (435342), we get a palindrome (678876).

It can be divided in two parts, 243 and 534, that added together give a palindrome (777).

The spelling of 243534 in words is "two hundred forty-three thousand, five hundred thirty-four".