126686 has 8 divisors (see below), whose sum is σ = 217200. Its totient is φ = 54288.

The previous prime is 126683. The next prime is 126691. The reversal of 126686 is 686621.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4511 + ... + 4538.

It is an arithmetic number, because the mean of its divisors is an integer number (27150).

2¹²⁶⁶⁸⁶ is an apocalyptic number.

126686 is a deficient number, since it is larger than the sum of its proper divisors (90514).

126686 is an equidigital number, since it uses as much as digits as its factorization.

126686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9058.

The product of its digits is 3456, while the sum is 29.

The square root of 126686 is about 355.9297683533. The cubic root of 126686 is about 50.2237968053.

It can be divided in two parts, 126 and 686, that multiplied together give a square (86436 = 294²).

The spelling of 126686 in words is "one hundred twenty-six thousand, six hundred eighty-six".