125665 is nontrivially palindromic in base 16.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a de Polignac number, because none of the positive numbers 2k-125665 is a prime.
It is a Duffinian number.
It is a congruent number.
2125665 is an apocalyptic number.
125665 is the 205-th octagonal number.
It is an amenable number.
125665 is an equidigital number, since it uses as much as digits as its factorization.
125665 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 659.
The square root of 125665 is about 354.4925951272. The cubic root of 125665 is about 50.0885098942.
The spelling of 125665 in words is "one hundred twenty-five thousand, six hundred sixty-five".