12398123 has 4 divisors (see below), whose sum is σ = 12420408. Its totient is φ = 12375840.

The previous prime is 12398119. The next prime is 12398137. The reversal of 12398123 is 32189321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32189321 = 827 ⋅38923.

It is a cyclic number.

It is not a de Polignac number, because 12398123 - 2² = 12398119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12398723) 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, 10286 + ... + 11427.

It is an arithmetic number, because the mean of its divisors is an integer number (3105102).

Almost surely, 2^12398123 is an apocalyptic number.

12398123 is a deficient number, since it is larger than the sum of its proper divisors (22285).

12398123 is an equidigital number, since it uses as much as digits as its factorization.

12398123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22284.

The product of its digits is 2592, while the sum is 29.

The square root of 12398123 is about 3521.0968461546. The cubic root of 12398123 is about 231.4472261438.

It can be divided in two parts, 12398 and 123, that added together give a palindrome (12521).

The spelling of 12398123 in words is "twelve million, three hundred ninety-eight thousand, one hundred twenty-three".