126617 has 4 divisors (see below), whose sum is σ = 129060. Its totient is φ = 124176.

The previous prime is 126613. The next prime is 126631. The reversal of 126617 is 716621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59536 + 67081 = 244^2 + 259^2 .

It is a cyclic number.

It is not a de Polignac number, because 126617 - 2² = 126613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126592 and 126601.

It is not an unprimeable number, because it can be changed into a prime (126611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1142 + ... + 1247.

It is an arithmetic number, because the mean of its divisors is an integer number (32265).

2¹²⁶⁶¹⁷ is an apocalyptic number.

It is an amenable number.

126617 is a deficient number, since it is larger than the sum of its proper divisors (2443).

126617 is an equidigital number, since it uses as much as digits as its factorization.

126617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2442.

The product of its digits is 504, while the sum is 23.

The square root of 126617 is about 355.8328259169. The cubic root of 126617 is about 50.2146769569.

The spelling of 126617 in words is "one hundred twenty-six thousand, six hundred seventeen".