12129659 has 2 divisors, whose sum is σ = 12129660. Its totient is φ = 12129658.

The previous prime is 12129617. The next prime is 12129661. The reversal of 12129659 is 95692121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12129659 - 2¹² = 12125563 is a prime.

Together with 12129661, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12129059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6064829 + 6064830.

It is an arithmetic number, because the mean of its divisors is an integer number (6064830).

Almost surely, 2^12129659 is an apocalyptic number.

12129659 is a deficient number, since it is larger than the sum of its proper divisors (1).

12129659 is an equidigital number, since it uses as much as digits as its factorization.

12129659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 35.

The square root of 12129659 is about 3482.7659984558. The cubic root of 12129659 is about 229.7644658753.

The spelling of 12129659 in words is "twelve million, one hundred twenty-nine thousand, six hundred fifty-nine".