129195157 has 16 divisors (see below), whose sum is σ = 163311232. Its totient is φ = 99455040.

The previous prime is 129195149. The next prime is 129195169. The reversal of 129195157 is 751591921.

It is a cyclic number.

It is not a de Polignac number, because 129195157 - 2³ = 129195149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129195557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15819 + ... + 22552.

It is an arithmetic number, because the mean of its divisors is an integer number (10206952).

Almost surely, 2^129195157 is an apocalyptic number.

It is an amenable number.

129195157 is a deficient number, since it is larger than the sum of its proper divisors (34116075).

129195157 is a wasteful number, since it uses less digits than its factorization.

129195157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38428.

The product of its digits is 28350, while the sum is 40.

The square root of 129195157 is about 11366.4047526032. The cubic root of 129195157 is about 505.5321084771.

The spelling of 129195157 in words is "one hundred twenty-nine million, one hundred ninety-five thousand, one hundred fifty-seven".