243542 has 32 divisors (see below), whose sum is σ = 453600. Its totient is φ = 96768.

The previous prime is 243539. The next prime is 243553. The reversal of 243542 is 245342.

It is a super-3 number, since 3×243542³ = 43335404961528264, which contains 333 as substring.

Its product of digits (960) is a multiple of the sum of its prime divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8384 + ... + 8412.

It is an arithmetic number, because the mean of its divisors is an integer number (14175).

2²⁴³⁵⁴² is an apocalyptic number.

It is a pronic number, being equal to 493×494.

243542 is a deficient number, since it is larger than the sum of its proper divisors (210058).

243542 is a wasteful number, since it uses less digits than its factorization.

243542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80.

The product of its digits is 960, while the sum is 20.

The square root of 243542 is about 493.4997467071. The cubic root of 243542 is about 62.4488755253.

Adding to 243542 its reverse (245342), we get a palindrome (488884).

The spelling of 243542 in words is "two hundred forty-three thousand, five hundred forty-two".