125686 has 16 divisors (see below), whose sum is σ = 213840. Its totient is φ = 54880.

The previous prime is 125683. The next prime is 125687. The reversal of 125686 is 686521.

125686 is nontrivially palindromic in base 7.

It is a congruent number.

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, 540 + ... + 736.

It is an arithmetic number, because the mean of its divisors is an integer number (13365).

2¹²⁵⁶⁸⁶ is an apocalyptic number.

125686 is the 190-th centered heptagonal number.

125686 is a deficient number, since it is larger than the sum of its proper divisors (88154).

125686 is a wasteful number, since it uses less digits than its factorization.

125686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239.

The product of its digits is 2880, while the sum is 28.

The square root of 125686 is about 354.5222136905. The cubic root of 125686 is about 50.0912998519.

The spelling of 125686 in words is "one hundred twenty-five thousand, six hundred eighty-six".