129395081 has 8 divisors (see below), whose sum is σ = 130389504. Its totient is φ = 128404800.

The previous prime is 129395059. The next prime is 129395087. The reversal of 129395081 is 180593921.

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 129395081 - 2¹⁸ = 129132937 is a prime.

It is a super-2 number, since 2×129395081² = 33486173973993122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129395087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88700 + ... + 90146.

It is an arithmetic number, because the mean of its divisors is an integer number (16298688).

Almost surely, 2^129395081 is an apocalyptic number.

It is an amenable number.

129395081 is a deficient number, since it is larger than the sum of its proper divisors (994423).

129395081 is a wasteful number, since it uses less digits than its factorization.

129395081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2071.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 129395081 is about 11375.1958664456. The cubic root of 129395081 is about 505.7927372178.

The spelling of 129395081 in words is "one hundred twenty-nine million, three hundred ninety-five thousand, eighty-one".