129156846 has 96 divisors (see below), whose sum is σ = 330946560. Its totient is φ = 33292224.

The previous prime is 129156829. The next prime is 129156869. The reversal of 129156846 is 648651921.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 129156798 and 129156807.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 179275 + ... + 179993.

It is an arithmetic number, because the mean of its divisors is an integer number (3447360).

Almost surely, 2^129156846 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129156846, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165473280).

129156846 is an abundant number, since it is smaller than the sum of its proper divisors (201789714).

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

129156846 is a wasteful number, since it uses less digits than its factorization.

129156846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798 (or 791 counting only the distinct ones).

The product of its digits is 103680, while the sum is 42.

The square root of 129156846 is about 11364.7193542120. The cubic root of 129156846 is about 505.4821340669.

The spelling of 129156846 in words is "one hundred twenty-nine million, one hundred fifty-six thousand, eight hundred forty-six".