129942066 has 8 divisors (see below), whose sum is σ = 259884144. Its totient is φ = 43314020.

The previous prime is 129942041. The next prime is 129942091. The reversal of 129942066 is 660249921.

It is an interprime number because it is at equal distance from previous prime (129942041) and next prime (129942091).

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

129942066 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10828500 + ... + 10828511.

It is an arithmetic number, because the mean of its divisors is an integer number (32485518).

Almost surely, 2^129942066 is an apocalyptic number.

129942066 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129942066 is a wasteful number, since it uses less digits than its factorization.

129942066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21657016.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 129942066 is about 11399.2133939145. The cubic root of 129942066 is about 506.5044389635.

It can be divided in two parts, 1299 and 42066, that added together give a triangular number (43365 = T₂₉₄).

The spelling of 129942066 in words is "one hundred twenty-nine million, nine hundred forty-two thousand, sixty-six".