123127 has 2 divisors, whose sum is σ = 123128.
Its totient is φ = 123126.
The previous prime is 123121. The next prime is 123143. The reversal of 123127 is 721321.
It is a happy number.
It is an a-pointer prime, because the next prime (123143) can be obtained adding 123127 to its sum of digits (16).
It is a weak prime.
It is an emirp because it is prime and its reverse (721321) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 123127 - 215 = 90359 is a prime.
It is a self number, because there is not a number n which added to its sum of digits gives 123127.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (123121) 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 as a sum of consecutive naturals, namely, 61563 + 61564.
It is an arithmetic number, because the mean of its divisors is an integer number (61564).
2123127 is an apocalyptic number.
123127 is a deficient number, since it is larger than the sum of its proper divisors (1).
123127 is an equidigital number, since it uses as much as digits as its factorization.
123127 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 84, while the sum is 16.
The square root of 123127 is about 350.8945710609.
The cubic root of 123127 is about 49.7490088437.
Adding to 123127 its reverse (721321), we get a palindrome (844448).
The spelling of 123127 in words is "one hundred twenty-three thousand, one hundred twenty-seven", and thus it is an iban number.