129017226 has 64 divisors (see below), whose sum is σ = 289336320. Its totient is φ = 38085120.

The previous prime is 129017183. The next prime is 129017227. The reversal of 129017226 is 622710921.

It is a junction number, because it is equal to n+sod(n) for n = 129017193 and 129017202.

It is not an unprimeable number, because it can be changed into a prime (129017227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 553606 + ... + 553838.

It is an arithmetic number, because the mean of its divisors is an integer number (4520880).

Almost surely, 2^129017226 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129017226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144668160).

129017226 is an abundant number, since it is smaller than the sum of its proper divisors (160319094).

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

129017226 is a wasteful number, since it uses less digits than its factorization.

129017226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 129017226 is about 11358.5749986519. The cubic root of 129017226 is about 505.2999244410.

The spelling of 129017226 in words is "one hundred twenty-nine million, seventeen thousand, two hundred twenty-six".