115557 has 8 divisors (see below), whose sum is σ = 165984. Its totient is φ = 71088.

The previous prime is 115553. The next prime is 115561. The reversal of 115557 is 755511.

It is an interprime number because it is at equal distance from previous prime (115553) and next prime (115561).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 115557 - 2² = 115553 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1443 + ... + 1520.

It is an arithmetic number, because the mean of its divisors is an integer number (20748).

2¹¹⁵⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

115557 is a deficient number, since it is larger than the sum of its proper divisors (50427).

115557 is a wasteful number, since it uses less digits than its factorization.

115557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2979.

The product of its digits is 875, while the sum is 24.

The square root of 115557 is about 339.9367588243. The cubic root of 115557 is about 48.7078267747.

The spelling of 115557 in words is "one hundred fifteen thousand, five hundred fifty-seven".