129729154 has 16 divisors (see below), whose sum is σ = 204959808. Its totient is φ = 61462192.

The previous prime is 129729143. The next prime is 129729167. The reversal of 129729154 is 451927921.

It is a happy number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8257 + ... + 18100.

It is an arithmetic number, because the mean of its divisors is an integer number (12809988).

Almost surely, 2^129729154 is an apocalyptic number.

129729154 is a deficient number, since it is larger than the sum of its proper divisors (75230654).

129729154 is a wasteful number, since it uses less digits than its factorization.

129729154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26489.

The product of its digits is 45360, while the sum is 40.

The square root of 129729154 is about 11389.8706752974. The cubic root of 129729154 is about 506.2276493917.

The spelling of 129729154 in words is "one hundred twenty-nine million, seven hundred twenty-nine thousand, one hundred fifty-four".