129704745 has 16 divisors (see below), whose sum is σ = 208010880. Its totient is φ = 69014784.

The previous prime is 129704741. The next prime is 129704749. The reversal of 129704745 is 547407921.

It is an interprime number because it is at equal distance from previous prime (129704741) and next prime (129704749).

It is not a de Polignac number, because 129704745 - 2² = 129704741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129704741) 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, 3264 + ... + 16433.

It is an arithmetic number, because the mean of its divisors is an integer number (13000680).

Almost surely, 2^129704745 is an apocalyptic number.

129704745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129704745 is a deficient number, since it is larger than the sum of its proper divisors (78306135).

129704745 is a wasteful number, since it uses less digits than its factorization.

129704745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20144.

The product of its (nonzero) digits is 70560, while the sum is 39.

The square root of 129704745 is about 11388.7991026271. The cubic root of 129704745 is about 506.1958978916.

The spelling of 129704745 in words is "one hundred twenty-nine million, seven hundred four thousand, seven hundred forty-five".