126559 has 4 divisors (see below), whose sum is σ = 133240. Its totient is φ = 119880.

The previous prime is 126551. The next prime is 126583. The reversal of 126559 is 955621.

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

It is a cyclic number.

It is not a de Polignac number, because 126559 - 2³ = 126551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126551) 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, 3312 + ... + 3349.

It is an arithmetic number, because the mean of its divisors is an integer number (33310).

126559 is a Friedman number, since it can be written as (15^5-9)/6-2, using all its digits and the basic arithmetic operations.

2¹²⁶⁵⁵⁹ is an apocalyptic number.

126559 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

126559 is a deficient number, since it is larger than the sum of its proper divisors (6681).

126559 is an equidigital number, since it uses as much as digits as its factorization.

126559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6680.

The product of its digits is 2700, while the sum is 28.

The square root of 126559 is about 355.7513176364. The cubic root of 126559 is about 50.2070084341.

The spelling of 126559 in words is "one hundred twenty-six thousand, five hundred fifty-nine".