126685 has 8 divisors (see below), whose sum is σ = 163800. Its totient is φ = 93504.

The previous prime is 126683. The next prime is 126691. The reversal of 126685 is 586621.

It can be written as a sum of positive squares in 4 ways, for example, as 10404 + 116281 = 102^2 + 341^2 .

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 126685 - 2¹ = 126683 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 910 + ... + 1039.

It is an arithmetic number, because the mean of its divisors is an integer number (20475).

2¹²⁶⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

126685 is a deficient number, since it is larger than the sum of its proper divisors (37115).

126685 is a wasteful number, since it uses less digits than its factorization.

126685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1967.

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

The square root of 126685 is about 355.9283635790. The cubic root of 126685 is about 50.2236646572.

The spelling of 126685 in words is "one hundred twenty-six thousand, six hundred eighty-five".