129001139 has 16 divisors (see below), whose sum is σ = 133954560. Its totient is φ = 124185600.

The previous prime is 129001111. The next prime is 129001141. The reversal of 129001139 is 931100921.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129001139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129001109) 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, 1015694 + ... + 1015820.

It is an arithmetic number, because the mean of its divisors is an integer number (8372160).

Almost surely, 2^129001139 is an apocalyptic number.

129001139 is a deficient number, since it is larger than the sum of its proper divisors (4953421).

129001139 is a wasteful number, since it uses less digits than its factorization.

129001139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 129001139 is about 11357.8668331690. The cubic root of 129001139 is about 505.2789218250.

The spelling of 129001139 in words is "one hundred twenty-nine million, one thousand, one hundred thirty-nine".