5123 has 4 divisors (see below), whose sum is σ = 5280. Its totient is φ = 4968.

The previous prime is 5119. The next prime is 5147. The reversal of 5123 is 3215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3215 = 5 ⋅643.

It is a cyclic number.

It is not a de Polignac number, because 5123 - 2² = 5119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5113) 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, 8 + ... + 101.

It is an arithmetic number, because the mean of its divisors is an integer number (1320).

2⁵¹²³ is an apocalyptic number.

5123 is a deficient number, since it is larger than the sum of its proper divisors (157).

5123 is a wasteful number, since it uses less digits than its factorization.

5123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156.

The product of its digits is 30, while the sum is 11.

The square root of 5123 is about 71.5751353474. The cubic root of 5123 is about 17.2388431672.

Adding to 5123 its reverse (3215), we get a palindrome (8338).

It can be divided in two parts, 512 and 3, that added together give a palindrome (515).

The spelling of 5123 in words is "five thousand, one hundred twenty-three".