118842 has 16 divisors (see below), whose sum is σ = 246240. Its totient is φ = 38192.

The previous prime is 118831. The next prime is 118843. The reversal of 118842 is 248811.

Added to its reverse (248811) it gives a triangular number (367653 = T₈₅₇).

It is not an unprimeable number, because it can be changed into a prime (118843) by changing a digit.

118842 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, 168 + ... + 515.

It is an arithmetic number, because the mean of its divisors is an integer number (15390).

2¹¹⁸⁸⁴² is an apocalyptic number.

118842 is an abundant number, since it is smaller than the sum of its proper divisors (127398).

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

118842 is a wasteful number, since it uses less digits than its factorization.

118842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717.

The product of its digits is 512, while the sum is 24.

The square root of 118842 is about 344.7346805878. The cubic root of 118842 is about 49.1650687342.

Adding to 118842 its reverse (248811), we get a triangular number (367653 = T₈₅₇).

The spelling of 118842 in words is "one hundred eighteen thousand, eight hundred forty-two".