129029126249 has 16 divisors (see below), whose sum is σ = 133949306880. Its totient is φ = 124158074880.

The previous prime is 129029126243. The next prime is 129029126257. The reversal of 129029126249 is 942621920921.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 129029126249 - 2³⁶ = 60309649513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129029126243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4518992 + ... + 4547454.

It is an arithmetic number, because the mean of its divisors is an integer number (8371831680).

Almost surely, 2^129029126249 is an apocalyptic number.

It is an amenable number.

129029126249 is a deficient number, since it is larger than the sum of its proper divisors (4920180631).

129029126249 is a wasteful number, since it uses less digits than its factorization.

129029126249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29320.

The product of its (nonzero) digits is 279936, while the sum is 47.

The spelling of 129029126249 in words is "one hundred twenty-nine billion, twenty-nine million, one hundred twenty-six thousand, two hundred forty-nine".