129125889 has 12 divisors (see below), whose sum is σ = 186614272. Its totient is φ = 86038200.

The previous prime is 129125879. The next prime is 129125921. The reversal of 129125889 is 988521921.

It is not a de Polignac number, because 129125889 - 2¹⁹ = 128601601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129125849) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28404 + ... + 32634.

Almost surely, 2^129125889 is an apocalyptic number.

It is an amenable number.

129125889 is a deficient number, since it is larger than the sum of its proper divisors (57488383).

129125889 is a wasteful number, since it uses less digits than its factorization.

129125889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7628 (or 7625 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 129125889 is about 11363.3572943915. The cubic root of 129125889 is about 505.4417452908.

The spelling of 129125889 in words is "one hundred twenty-nine million, one hundred twenty-five thousand, eight hundred eighty-nine".