240542 has 8 divisors (see below), whose sum is σ = 369336. Its totient is φ = 117432.

The previous prime is 240517. The next prime is 240551. The reversal of 240542 is 245042.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 240542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1313 + ... + 1484.

It is an arithmetic number, because the mean of its divisors is an integer number (46167).

2²⁴⁰⁵⁴² is an apocalyptic number.

240542 is a deficient number, since it is larger than the sum of its proper divisors (128794).

240542 is a wasteful number, since it uses less digits than its factorization.

240542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2842.

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 240542 is about 490.4508130282. The cubic root of 240542 is about 62.1913960590.

Adding to 240542 its reverse (245042), we get a palindrome (485584).

The spelling of 240542 in words is "two hundred forty thousand, five hundred forty-two".