12817123 has 4 divisors (see below), whose sum is σ = 13982328. Its totient is φ = 11651920.

The previous prime is 12817117. The next prime is 12817151. The reversal of 12817123 is 32171821.

It is a happy number.

12817123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32171821 = 11 ⋅2924711.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12817123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12817823) 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, 582586 + ... + 582607.

It is an arithmetic number, because the mean of its divisors is an integer number (3495582).

Almost surely, 2^12817123 is an apocalyptic number.

12817123 is a deficient number, since it is larger than the sum of its proper divisors (1165205).

12817123 is a wasteful number, since it uses less digits than its factorization.

12817123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165204.

The product of its digits is 672, while the sum is 25.

The square root of 12817123 is about 3580.1009762296. The cubic root of 12817123 is about 234.0256808204.

Adding to 12817123 its reverse (32171821), we get a palindrome (44988944).

The spelling of 12817123 in words is "twelve million, eight hundred seventeen thousand, one hundred twenty-three".