10123 has 4 divisors (see below), whose sum is σ = 10368.
Its totient is φ = 9880.
The previous prime is 10111. The next prime is 10133. The reversal of 10123 is 32101.
10123 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32101 = 47 ⋅683.
It is a cyclic number.
It is not a de Polignac number, because 10123 - 25 = 10091 is a prime.
It is an alternating number because its digits alternate between odd and even.
It is a Duffinian number.
It is the 15-th primeval number, because it sets a new record (35) in the number of distinct primes that is it possible to write using its digits.
It is a plaindrome in base 16.
It is not an unprimeable number, because it can be changed into a prime (10103) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43 + ... + 148.
It is an arithmetic number, because the mean of its divisors is an integer number (2592).
210123 is an apocalyptic number.
10123 is a deficient number, since it is larger than the sum of its proper divisors (245).
10123 is an equidigital number, since it uses as much as digits as its factorization.
10123 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 244.
The product of its (nonzero) digits is 6, while the sum is 7.
The square root of 10123 is about 100.6131204168.
The cubic root of 10123 is about 21.6323190168.
Adding to 10123 its reverse (32101), we get a palindrome (42224).
The spelling of 10123 in words is "ten thousand, one hundred twenty-three", and thus it is an iban number.