116557 has 4 divisors (see below), whose sum is σ = 133216. Its totient is φ = 99900.

The previous prime is 116549. The next prime is 116579. The reversal of 116557 is 755611.

116557 is nontrivially palindromic in base 4.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 755611 = 19 ⋅39769.

It is a cyclic number.

It is not a de Polignac number, because 116557 - 2³ = 116549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116507) 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, 8319 + ... + 8332.

It is an arithmetic number, because the mean of its divisors is an integer number (33304).

2¹¹⁶⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

116557 is a deficient number, since it is larger than the sum of its proper divisors (16659).

116557 is an equidigital number, since it uses as much as digits as its factorization.

116557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16658.

The product of its digits is 1050, while the sum is 25.

The square root of 116557 is about 341.4044522264. The cubic root of 116557 is about 48.8479250142.

It can be divided in two parts, 11 and 6557, that multiplied together give a palindrome (72127).

The spelling of 116557 in words is "one hundred sixteen thousand, five hundred fifty-seven".