118145 has 4 divisors (see below), whose sum is σ = 141780. Its totient is φ = 94512.

The previous prime is 118127. The next prime is 118147. The reversal of 118145 is 541811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541811 = 23 ⋅23557.

It can be written as a sum of positive squares in 2 ways, for example, as 16384 + 101761 = 128^2 + 319^2 .

It is a cyclic number.

It is not a de Polignac number, because 118145 - 2⁶ = 118081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (118147) 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, 11810 + ... + 11819.

It is an arithmetic number, because the mean of its divisors is an integer number (35445).

2¹¹⁸¹⁴⁵ is an apocalyptic number.

It is an amenable number.

118145 is a deficient number, since it is larger than the sum of its proper divisors (23635).

118145 is an equidigital number, since it uses as much as digits as its factorization.

118145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23634.

The product of its digits is 160, while the sum is 20.

The square root of 118145 is about 343.7222716089. The cubic root of 118145 is about 49.0687636532.

Adding to 118145 its reverse (541811), we get a palindrome (659956).

The spelling of 118145 in words is "one hundred eighteen thousand, one hundred forty-five".