129175345 has 8 divisors (see below), whose sum is σ = 166934376. Its totient is φ = 95390976.

The previous prime is 129175313. The next prime is 129175351. The reversal of 129175345 is 543571921.

It can be written as a sum of positive squares in 4 ways, for example, as 4004001 + 125171344 = 2001^2 + 11188^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 129175345 - 2⁵ = 129175313 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 993592 + ... + 993721.

It is an arithmetic number, because the mean of its divisors is an integer number (20866797).

Almost surely, 2^129175345 is an apocalyptic number.

It is an amenable number.

129175345 is a deficient number, since it is larger than the sum of its proper divisors (37759031).

129175345 is a wasteful number, since it uses less digits than its factorization.

129175345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1987331.

The product of its digits is 37800, while the sum is 37.

The square root of 129175345 is about 11365.5332035061. The cubic root of 129175345 is about 505.5062661406.

It can be divided in two parts, 1291 and 75345, that added together give a triangular number (76636 = T₃₉₁).

The spelling of 129175345 in words is "one hundred twenty-nine million, one hundred seventy-five thousand, three hundred forty-five".