129409002 has 40 divisors (see below), whose sum is σ = 294082272. Its totient is φ = 42525000.

The previous prime is 129408989. The next prime is 129409003. The reversal of 129409002 is 200904921.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (129409003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5877 + ... + 17127.

Almost surely, 2^129409002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129409002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147041136).

129409002 is an abundant number, since it is smaller than the sum of its proper divisors (164673270).

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

129409002 is a wasteful number, since it uses less digits than its factorization.

129409002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11336 (or 11327 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 129409002 is about 11375.8077515401. The cubic root of 129409002 is about 505.8108751772.

The spelling of 129409002 in words is "one hundred twenty-nine million, four hundred nine thousand, two".