129195156 has 12 divisors (see below), whose sum is σ = 301455392. Its totient is φ = 43065048.

The previous prime is 129195149. The next prime is 129195169. The reversal of 129195156 is 651591921.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent 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, 5383120 + ... + 5383143.

Almost surely, 2^129195156 is an apocalyptic number.

It is an amenable number.

129195156 is an abundant number, since it is smaller than the sum of its proper divisors (172260236).

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

129195156 is a wasteful number, since it uses less digits than its factorization.

129195156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10766270 (or 10766268 counting only the distinct ones).

The product of its digits is 24300, while the sum is 39.

The square root of 129195156 is about 11366.4047086139. The cubic root of 129195156 is about 505.5321071728.

The spelling of 129195156 in words is "one hundred twenty-nine million, one hundred ninety-five thousand, one hundred fifty-six".