129112910 has 32 divisors (see below), whose sum is σ = 237490272. Its totient is φ = 50526720.

The previous prime is 129112883. The next prime is 129112937. The reversal of 129112910 is 19211921.

It is an interprime number because it is at equal distance from previous prime (129112883) and next prime (129112937).

It is a self number, because there is not a number n which added to its sum of digits gives 129112910.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99365 + ... + 100655.

It is an arithmetic number, because the mean of its divisors is an integer number (7421571).

Almost surely, 2^129112910 is an apocalyptic number.

129112910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129112910 is a deficient number, since it is larger than the sum of its proper divisors (108377362).

129112910 is a wasteful number, since it uses less digits than its factorization.

129112910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508.

The product of its (nonzero) digits is 324, while the sum is 26.

The square root of 129112910 is about 11362.7861900152. The cubic root of 129112910 is about 505.4248100135.

The spelling of 129112910 in words is "one hundred twenty-nine million, one hundred twelve thousand, nine hundred ten".