129515705 has 8 divisors (see below), whose sum is σ = 169547904. Its totient is φ = 94193200.

The previous prime is 129515677. The next prime is 129515719. The reversal of 129515705 is 507515921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 129515705 - 2⁶ = 129515641 is a prime.

It is a Duffinian 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, 1177361 + ... + 1177470.

It is an arithmetic number, because the mean of its divisors is an integer number (21193488).

Almost surely, 2^129515705 is an apocalyptic number.

It is an amenable number.

129515705 is a deficient number, since it is larger than the sum of its proper divisors (40032199).

129515705 is a wasteful number, since it uses less digits than its factorization.

129515705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2354847.

The product of its (nonzero) digits is 15750, while the sum is 35.

The square root of 129515705 is about 11380.4966939058. The cubic root of 129515705 is about 505.9498575506.

The spelling of 129515705 in words is "one hundred twenty-nine million, five hundred fifteen thousand, seven hundred five".