12656123 has 2 divisors, whose sum is σ = 12656124. Its totient is φ = 12656122.

The previous prime is 12656107. The next prime is 12656129. The reversal of 12656123 is 32165621.

It is a strong prime.

It is an emirp because it is prime and its reverse (32165621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12656123 - 2⁴ = 12656107 is a prime.

It is a super-2 number, since 2×12656123² = 320354898782258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12656092 and 12656101.

It is not a weakly prime, because it can be changed into another prime (12656129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6328061 + 6328062.

It is an arithmetic number, because the mean of its divisors is an integer number (6328062).

Almost surely, 2^12656123 is an apocalyptic number.

12656123 is a deficient number, since it is larger than the sum of its proper divisors (1).

12656123 is an equidigital number, since it uses as much as digits as its factorization.

12656123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 26.

The square root of 12656123 is about 3557.5445183441. The cubic root of 12656123 is about 233.0416584505.

The spelling of 12656123 in words is "twelve million, six hundred fifty-six thousand, one hundred twenty-three".