118511 has 4 divisors (see below), whose sum is σ = 121752. Its totient is φ = 115272.

The previous prime is 118493. The next prime is 118529. The reversal of 118511 is 115811.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (118493) and next prime (118529).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118511 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 118511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1565 + ... + 1638.

It is an arithmetic number, because the mean of its divisors is an integer number (30438).

2¹¹⁸⁵¹¹ is an apocalyptic number.

118511 is a deficient number, since it is larger than the sum of its proper divisors (3241).

118511 is an equidigital number, since it uses as much as digits as its factorization.

118511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3240.

The product of its digits is 40, while the sum is 17.

The square root of 118511 is about 344.2542664950. The cubic root of 118511 is about 49.1193812677.

The spelling of 118511 in words is "one hundred eighteen thousand, five hundred eleven".