129216146 has 8 divisors (see below), whose sum is σ = 194448384. Its totient is φ = 64400020.

The previous prime is 129216137. The next prime is 129216151. The reversal of 129216146 is 641612921.

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

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, 103250 + ... + 104493.

It is an arithmetic number, because the mean of its divisors is an integer number (24306048).

Almost surely, 2^129216146 is an apocalyptic number.

129216146 is a deficient number, since it is larger than the sum of its proper divisors (65232238).

129216146 is a wasteful number, since it uses less digits than its factorization.

129216146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208056.

The product of its digits is 5184, while the sum is 32.

The square root of 129216146 is about 11367.3280061763. The cubic root of 129216146 is about 505.5594831845.

The spelling of 129216146 in words is "one hundred twenty-nine million, two hundred sixteen thousand, one hundred forty-six".