129287 has 2 divisors, whose sum is σ = 129288. Its totient is φ = 129286.
The previous prime is 129281. The next prime is 129289. The reversal of 129287 is 782921.
It is a happy number.
It is a strong prime.
It is an emirp because it is prime and its reverse (782921) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 129287 - 26 = 129223 is a prime.
Together with 129289, it forms a pair of twin primes.
It is a Chen prime.
It is a pancake number, because a pancake can be divided into 129287 parts by 508 straight cuts.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 129287.
It is not a weakly prime, because it can be changed into another prime (129281) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64643 + 64644.
It is an arithmetic number, because the mean of its divisors is an integer number (64644).
2129287 is an apocalyptic number.
129287 is a deficient number, since it is larger than the sum of its proper divisors (1).
129287 is an equidigital number, since it uses as much as digits as its factorization.
129287 is an evil number, because the sum of its binary digits is even.
The product of its digits is 2016, while the sum is 29.
The square root of 129287 is about 359.5650149834. The cubic root of 129287 is about 50.5651871965.
The spelling of 129287 in words is "one hundred twenty-nine thousand, two hundred eighty-seven".
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