65129 has 2 divisors, whose sum is σ = 65130. Its totient is φ = 65128.

The previous prime is 65123. The next prime is 65141. The reversal of 65129 is 92156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42025 + 23104 = 205^2 + 152^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65129 is a prime.

It is a Sophie Germain prime.

It is an Ulam number.

It is a Curzon number.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (65123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32564 + 32565.

It is an arithmetic number, because the mean of its divisors is an integer number (32565).

2⁶⁵¹²⁹ is an apocalyptic number.

It is an amenable number.

65129 is a deficient number, since it is larger than the sum of its proper divisors (1).

65129 is an equidigital number, since it uses as much as digits as its factorization.

65129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 540, while the sum is 23.

The square root of 65129 is about 255.2038400965. The cubic root of 65129 is about 40.2338386566.

It can be divided in two parts, 65 and 129, that multiplied together give a triangular number (8385 = T₁₂₉).

The spelling of 65129 in words is "sixty-five thousand, one hundred twenty-nine".