68542 has 8 divisors (see below), whose sum is σ = 105336. Its totient is φ = 33432.

The previous prime is 68539. The next prime is 68543. The reversal of 68542 is 24586.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68543) 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, 313 + ... + 484.

It is an arithmetic number, because the mean of its divisors is an integer number (13167).

2⁶⁸⁵⁴² is an apocalyptic number.

68542 is a deficient number, since it is larger than the sum of its proper divisors (36794).

68542 is a wasteful number, since it uses less digits than its factorization.

68542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842.

The product of its digits is 1920, while the sum is 25.

The square root of 68542 is about 261.8052711463. The cubic root of 68542 is about 40.9247081413.

Subtracting from 68542 its reverse (24586), we obtain a triangular number (43956 = T₂₉₆).

It can be divided in two parts, 685 and 42, that added together give a palindrome (727).

The spelling of 68542 in words is "sixty-eight thousand, five hundred forty-two".