115669 has 4 divisors (see below), whose sum is σ = 116896. Its totient is φ = 114444.

The previous prime is 115663. The next prime is 115679. The reversal of 115669 is 966511.

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.

It is a cyclic number.

It is not a de Polignac number, because 115669 - 2⁵ = 115637 is a prime.

It is a super-2 number, since 2×115669² = 26758635122, which contains 22 as substring.

It is a Duffinian number.

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 (115663) 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, 459 + ... + 664.

It is an arithmetic number, because the mean of its divisors is an integer number (29224).

2¹¹⁵⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

115669 is a deficient number, since it is larger than the sum of its proper divisors (1227).

115669 is a wasteful number, since it uses less digits than its factorization.

115669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226.

The product of its digits is 1620, while the sum is 28.

The square root of 115669 is about 340.1014554512. The cubic root of 115669 is about 48.7235578716.

It can be divided in two parts, 1156 and 69, that added together give a triangular number (1225 = T₄₉).

The spelling of 115669 in words is "one hundred fifteen thousand, six hundred sixty-nine".