129156 has 24 divisors (see below), whose sum is σ = 309120. Its totient is φ = 41952.

The previous prime is 129127. The next prime is 129169. The reversal of 129156 is 651921.

It is an unprimeable number.

129156 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 450 + ... + 678.

It is an arithmetic number, because the mean of its divisors is an integer number (12880).

2¹²⁹¹⁵⁶ is an apocalyptic number.

It is an amenable number.

129156 is an abundant number, since it is smaller than the sum of its proper divisors (179964).

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

129156 is a wasteful number, since it uses less digits than its factorization.

129156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283 (or 281 counting only the distinct ones).

The product of its digits is 540, while the sum is 24.

The square root of 129156 is about 359.3828042631. The cubic root of 129156 is about 50.5481030399.

It can be divided in two parts, 12915 and 6, that added together give a palindrome (12921).

The spelling of 129156 in words is "one hundred twenty-nine thousand, one hundred fifty-six".