129539 has 2 divisors, whose sum is σ = 129540. Its totient is φ = 129538.
The previous prime is 129533. The next prime is 129553. The reversal of 129539 is 935921.
It is a weak prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-129539 is a prime.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (129533) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64769 + 64770.
It is an arithmetic number, because the mean of its divisors is an integer number (64770).
2129539 is an apocalyptic number.
129539 is a deficient number, since it is larger than the sum of its proper divisors (1).
129539 is an equidigital number, since it uses as much as digits as its factorization.
129539 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 2430, while the sum is 29.
The square root of 129539 is about 359.9152678062. The cubic root of 129539 is about 50.5980189510.
It can be divided in two parts, 1295 and 39, that multiplied together give a palindrome (50505).
The spelling of 129539 in words is "one hundred twenty-nine thousand, five hundred thirty-nine".
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