118445 has 4 divisors (see below), whose sum is σ = 142140. Its totient is φ = 94752.

The previous prime is 118429. The next prime is 118453. The reversal of 118445 is 544811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 544811 = 617 ⋅883.

It can be written as a sum of positive squares in 2 ways, for example, as 17956 + 100489 = 134^2 + 317^2 .

It is a cyclic number.

It is not a de Polignac number, because 118445 - 2⁴ = 118429 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 118445.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11840 + ... + 11849.

It is an arithmetic number, because the mean of its divisors is an integer number (35535).

2¹¹⁸⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

118445 is a deficient number, since it is larger than the sum of its proper divisors (23695).

118445 is an equidigital number, since it uses as much as digits as its factorization.

118445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23694.

The product of its digits is 640, while the sum is 23.

The square root of 118445 is about 344.1583937666. The cubic root of 118445 is about 49.1102612109.

The spelling of 118445 in words is "one hundred eighteen thousand, four hundred forty-five".