129299146 has 16 divisors (see below), whose sum is σ = 205406784. Its totient is φ = 60914304.

The previous prime is 129299119. The next prime is 129299147. The reversal of 129299146 is 641992921.

It is not an unprimeable number, because it can be changed into a prime (129299147) 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, 17895 + ... + 24058.

It is an arithmetic number, because the mean of its divisors is an integer number (12837924).

Almost surely, 2^129299146 is an apocalyptic number.

129299146 is a deficient number, since it is larger than the sum of its proper divisors (76107638).

129299146 is a wasteful number, since it uses less digits than its factorization.

129299146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42045.

The product of its digits is 69984, while the sum is 43.

The square root of 129299146 is about 11370.9782340835. The cubic root of 129299146 is about 505.6677061303.

The spelling of 129299146 in words is "one hundred twenty-nine million, two hundred ninety-nine thousand, one hundred forty-six".