12655439 has 2 divisors, whose sum is σ = 12655440. Its totient is φ = 12655438.

The previous prime is 12655421. The next prime is 12655457. The reversal of 12655439 is 93455621.

12655439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (12655421) and next prime (12655457).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12655439 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12655399 and 12655408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12655039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6327719 + 6327720.

It is an arithmetic number, because the mean of its divisors is an integer number (6327720).

Almost surely, 2^12655439 is an apocalyptic number.

12655439 is a deficient number, since it is larger than the sum of its proper divisors (1).

12655439 is an equidigital number, since it uses as much as digits as its factorization.

12655439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 35.

The square root of 12655439 is about 3557.4483833220. The cubic root of 12655439 is about 233.0374601305.

The spelling of 12655439 in words is "twelve million, six hundred fifty-five thousand, four hundred thirty-nine".