129081513 has 16 divisors (see below), whose sum is σ = 188369856. Its totient is φ = 77975040.

The previous prime is 129081509. The next prime is 129081521. The reversal of 129081513 is 315180921.

It is not a de Polignac number, because 129081513 - 2² = 129081509 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129081583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4081 + ... + 16577.

It is an arithmetic number, because the mean of its divisors is an integer number (11773116).

Almost surely, 2^129081513 is an apocalyptic number.

It is an amenable number.

129081513 is a deficient number, since it is larger than the sum of its proper divisors (59288343).

129081513 is a wasteful number, since it uses less digits than its factorization.

129081513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12824.

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 129081513 is about 11361.4045346515. The cubic root of 129081513 is about 505.3838378411.

The spelling of 129081513 in words is "one hundred twenty-nine million, eighty-one thousand, five hundred thirteen".