It is an alternating number because its digits alternate between odd and even.
It is a plaindrome in base 10.
It is a self number, because there is not a number n which added to its sum of digits gives 125678.
It is a congruent number.
It is an unprimeable number.
2125678 is an apocalyptic number.
125678 is a wasteful number, since it uses less digits than its factorization.
125678 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 247.
The square root of 125678 is about 354.5109307201. The cubic root of 125678 is about 50.0902370475.
The spelling of 125678 in words is "one hundred twenty-five thousand, six hundred seventy-eight".