125689 has 8 divisors (see below), whose sum is σ = 133760. Its totient is φ = 117936.

The previous prime is 125687. The next prime is 125693. The reversal of 125689 is 986521.

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

It is a cyclic number.

It is not a de Polignac number, because 125689 - 2¹ = 125687 is a prime.

It is a Duffinian number.

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 125689.

It is not an unprimeable number, because it can be changed into a prime (125683) 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, 1552 + ... + 1630.

It is an arithmetic number, because the mean of its divisors is an integer number (16720).

2¹²⁵⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

125689 is a deficient number, since it is larger than the sum of its proper divisors (8071).

125689 is an equidigital number, since it uses as much as digits as its factorization.

125689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159.

The product of its digits is 4320, while the sum is 31.

The square root of 125689 is about 354.5264447118. The cubic root of 125689 is about 50.0916983920.

The spelling of 125689 in words is "one hundred twenty-five thousand, six hundred eighty-nine".