126623 has 4 divisors (see below), whose sum is σ = 144720. Its totient is φ = 108528.
The previous prime is 126613. The next prime is 126631. The reversal of 126623 is 326621.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 326621 = 17 ⋅19213.
It is not a de Polignac number, because 126623 - 212 = 122527 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 126595 and 126604.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (126613) 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, 9038 + ... + 9051.
It is an arithmetic number, because the mean of its divisors is an integer number (36180).
2126623 is an apocalyptic number.
126623 is a deficient number, since it is larger than the sum of its proper divisors (18097).
126623 is an equidigital number, since it uses as much as digits as its factorization.
126623 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 18096.
The product of its digits is 432, while the sum is 20.
The square root of 126623 is about 355.8412567424. The cubic root of 126623 is about 50.2154701187.
The spelling of 126623 in words is "one hundred twenty-six thousand, six hundred twenty-three".
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