5138123 has 4 divisors (see below), whose sum is σ = 5146080. Its totient is φ = 5130168.

The previous prime is 5138117. The next prime is 5138137. The reversal of 5138123 is 3218315.

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 5138123 - 2¹⁸ = 4875979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5138183) 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, 2915 + ... + 4332.

It is an arithmetic number, because the mean of its divisors is an integer number (1286520).

Almost surely, 2^5138123 is an apocalyptic number.

5138123 is a deficient number, since it is larger than the sum of its proper divisors (7957).

5138123 is an equidigital number, since it uses as much as digits as its factorization.

5138123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7956.

The product of its digits is 720, while the sum is 23.

The square root of 5138123 is about 2266.7428173483. The cubic root of 5138123 is about 172.5578941711.

The spelling of 5138123 in words is "five million, one hundred thirty-eight thousand, one hundred twenty-three".