118557 has 8 divisors (see below), whose sum is σ = 175680. Its totient is φ = 79020.

The previous prime is 118549. The next prime is 118571. The reversal of 118557 is 755811.

It is not a de Polignac number, because 118557 - 2³ = 118549 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 4391 = 118557 / (1 + 1 + 8 + 5 + 5 + 7).

118557 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 118557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118057) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2169 + ... + 2222.

It is an arithmetic number, because the mean of its divisors is an integer number (21960).

2¹¹⁸⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

118557 is a deficient number, since it is larger than the sum of its proper divisors (57123).

118557 is an equidigital number, since it uses as much as digits as its factorization.

118557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4400 (or 4394 counting only the distinct ones).

The product of its digits is 1400, while the sum is 27.

The square root of 118557 is about 344.3210710950. The cubic root of 118557 is about 49.1257356687.

The spelling of 118557 in words is "one hundred eighteen thousand, five hundred fifty-seven".