129250066 has 8 divisors (see below), whose sum is σ = 211500144. Its totient is φ = 58750020.

The previous prime is 129250063. The next prime is 129250091. The reversal of 129250066 is 660052921.

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

It is a super-2 number, since 2×129250066² = 33411159122008712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129250063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2937480 + ... + 2937523.

It is an arithmetic number, because the mean of its divisors is an integer number (26437518).

Almost surely, 2^129250066 is an apocalyptic number.

129250066 is a deficient number, since it is larger than the sum of its proper divisors (82250078).

129250066 is a wasteful number, since it uses less digits than its factorization.

129250066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5875016.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 129250066 is about 11368.8199035784. The cubic root of 129250066 is about 505.6037167624.

The spelling of 129250066 in words is "one hundred twenty-nine million, two hundred fifty thousand, sixty-six".