129049 has 2 divisors, whose sum is σ = 129050. Its totient is φ = 129048.
The previous prime is 129037. The next prime is 129061. The reversal of 129049 is 940921.
It is a balanced prime because it is at equal distance from previous prime (129037) and next prime (129061).
It can be written as a sum of positive squares in only one way, i.e., 127449 + 1600 = 357^2 + 40^2 .
It is an emirp because it is prime and its reverse (940921) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 129049 - 215 = 96281 is a prime.
It is not a weakly prime, because it can be changed into another prime (129089) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64524 + 64525.
It is an arithmetic number, because the mean of its divisors is an integer number (64525).
2129049 is an apocalyptic number.
It is an amenable number.
129049 is a deficient number, since it is larger than the sum of its proper divisors (1).
129049 is an equidigital number, since it uses as much as digits as its factorization.
129049 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 648, while the sum is 25.
The square root of 129049 is about 359.2339070856. The cubic root of 129049 is about 50.5341402318.
The spelling of 129049 in words is "one hundred twenty-nine thousand, forty-nine".
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