129435039 has 24 divisors (see below), whose sum is σ = 192254400. Its totient is φ = 83873088.

The previous prime is 129435023. The next prime is 129435043. The reversal of 129435039 is 930534921.

It is a happy number.

It is not a de Polignac number, because 129435039 - 2⁴ = 129435023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129434994 and 129435012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129445039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65437 + ... + 67385.

It is an arithmetic number, because the mean of its divisors is an integer number (8010600).

Almost surely, 2^129435039 is an apocalyptic number.

129435039 is a deficient number, since it is larger than the sum of its proper divisors (62819361).

129435039 is a wasteful number, since it uses less digits than its factorization.

129435039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2159 (or 2156 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 129435039 is about 11376.9520962339. The cubic root of 129435039 is about 505.8447958329.

The spelling of 129435039 in words is "one hundred twenty-nine million, four hundred thirty-five thousand, thirty-nine".