129495866 has 8 divisors (see below), whose sum is σ = 200509824. Its totient is φ = 62659260.

The previous prime is 129495829. The next prime is 129495869. The reversal of 129495866 is 668594921.

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

It is a super-2 number, since 2×129495866² = 33538358622179912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129495869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1044260 + ... + 1044383.

It is an arithmetic number, because the mean of its divisors is an integer number (25063728).

Almost surely, 2^129495866 is an apocalyptic number.

129495866 is a deficient number, since it is larger than the sum of its proper divisors (71013958).

129495866 is a wasteful number, since it uses less digits than its factorization.

129495866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2088676.

The product of its digits is 933120, while the sum is 50.

The square root of 129495866 is about 11379.6250377594. The cubic root of 129495866 is about 505.9240227126.

The spelling of 129495866 in words is "one hundred twenty-nine million, four hundred ninety-five thousand, eight hundred sixty-six".