129420846 has 48 divisors (see below), whose sum is σ = 296569728. Its totient is φ = 40723200.

The previous prime is 129420827. The next prime is 129420853. The reversal of 129420846 is 648024921.

It is a self number, because there is not a number n which added to its sum of digits gives 129420846.

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 23 ways as a sum of consecutive naturals, for example, 20050 + ... + 25706.

It is an arithmetic number, because the mean of its divisors is an integer number (6178536).

Almost surely, 2^129420846 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129420846, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148284864).

129420846 is an abundant number, since it is smaller than the sum of its proper divisors (167148882).

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

129420846 is a wasteful number, since it uses less digits than its factorization.

129420846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5737 (or 5734 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 129420846 is about 11376.3283180471. The cubic root of 129420846 is about 505.8263059462.

The spelling of 129420846 in words is "one hundred twenty-nine million, four hundred twenty thousand, eight hundred forty-six".