12789871 has 2 divisors, whose sum is σ = 12789872. Its totient is φ = 12789870.

The previous prime is 12789859. The next prime is 12789883. The reversal of 12789871 is 17898721.

It is a happy number.

12789871 is digitally balanced in base 2 and base 3, because in such bases 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 (12789859) and next prime (12789883).

It is a cyclic number.

It is not a de Polignac number, because 12789871 - 2¹¹ = 12787823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12789811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6394935 + 6394936.

It is an arithmetic number, because the mean of its divisors is an integer number (6394936).

Almost surely, 2^12789871 is an apocalyptic number.

12789871 is a deficient number, since it is larger than the sum of its proper divisors (1).

12789871 is an equidigital number, since it uses as much as digits as its factorization.

12789871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 43.

The square root of 12789871 is about 3576.2929130596. The cubic root of 12789871 is about 233.8596999082.

It can be divided in two parts, 127 and 89871, that added together give a palindrome (89998).

The spelling of 12789871 in words is "twelve million, seven hundred eighty-nine thousand, eight hundred seventy-one".