12651839 has 2 divisors, whose sum is σ = 12651840. Its totient is φ = 12651838.

The previous prime is 12651833. The next prime is 12651841. The reversal of 12651839 is 93815621.

12651839 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12651839 is a prime.

Together with 12651841, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12651799 and 12651808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12651833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6325919 + 6325920.

It is an arithmetic number, because the mean of its divisors is an integer number (6325920).

Almost surely, 2^12651839 is an apocalyptic number.

12651839 is a deficient number, since it is larger than the sum of its proper divisors (1).

12651839 is an equidigital number, since it uses as much as digits as its factorization.

12651839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 35.

The square root of 12651839 is about 3556.9423666964. The cubic root of 12651839 is about 233.0153612153.

The spelling of 12651839 in words is "twelve million, six hundred fifty-one thousand, eight hundred thirty-nine".