118542 has 16 divisors (see below), whose sum is σ = 247680. Its totient is φ = 37752.

The previous prime is 118529. The next prime is 118543. The reversal of 118542 is 245811.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 118542.

It is not an unprimeable number, because it can be changed into a prime (118543) by changing a digit.

118542 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292 + ... + 567.

It is an arithmetic number, because the mean of its divisors is an integer number (15480).

2¹¹⁸⁵⁴² is an apocalyptic number.

118542 is an abundant number, since it is smaller than the sum of its proper divisors (129138).

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

118542 is a wasteful number, since it uses less digits than its factorization.

118542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887.

The product of its digits is 320, while the sum is 21.

The square root of 118542 is about 344.2992884105. The cubic root of 118542 is about 49.1236637621.

It can be divided in two parts, 1185 and 42, that multiplied together give a triangular number (49770 = T₃₁₅).

The spelling of 118542 in words is "one hundred eighteen thousand, five hundred forty-two".