115501 has 4 divisors (see below), whose sum is σ = 121600. Its totient is φ = 109404.

The previous prime is 115499. The next prime is 115513. The reversal of 115501 is 105511.

115501 = T₃₃ + T₃₄ + ... + T₈₉.

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: 105511 = 7 ⋅15073.

It is a cyclic number.

It is not a de Polignac number, because 115501 - 2¹ = 115499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115561) 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, 3021 + ... + 3058.

It is an arithmetic number, because the mean of its divisors is an integer number (30400).

2¹¹⁵⁵⁰¹ is an apocalyptic number.

It is an amenable number.

115501 is a deficient number, since it is larger than the sum of its proper divisors (6099).

115501 is an equidigital number, since it uses as much as digits as its factorization.

115501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6098.

The product of its (nonzero) digits is 25, while the sum is 13.

The square root of 115501 is about 339.8543805809. The cubic root of 115501 is about 48.6999574143.

It can be divided in two parts, 115 and 501, that added together give a palindrome (616).

The spelling of 115501 in words is "one hundred fifteen thousand, five hundred one".