129157 has 4 divisors (see below), whose sum is σ = 147616. Its totient is φ = 110700.

The previous prime is 129127. The next prime is 129169. The reversal of 129157 is 751921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129157 is a prime.

129157 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9219 + ... + 9232.

It is an arithmetic number, because the mean of its divisors is an integer number (36904).

2¹²⁹¹⁵⁷ is an apocalyptic number.

It is an amenable number.

129157 is a deficient number, since it is larger than the sum of its proper divisors (18459).

129157 is an equidigital number, since it uses as much as digits as its factorization.

129157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18458.

The product of its digits is 630, while the sum is 25.

The square root of 129157 is about 359.3841955345. The cubic root of 129157 is about 50.5482334970.

The spelling of 129157 in words is "one hundred twenty-nine thousand, one hundred fifty-seven".