129229104 has 160 divisors (see below), whose sum is σ = 377118720. Its totient is φ = 37933056.

The previous prime is 129229103. The next prime is 129229117. The reversal of 129229104 is 401922921.

It is a happy number.

It is a super-2 number, since 2×129229104² = 33400322641285632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129229103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1017489 + ... + 1017615.

It is an arithmetic number, because the mean of its divisors is an integer number (2356992).

Almost surely, 2^129229104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129229104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (188559360).

129229104 is an abundant number, since it is smaller than the sum of its proper divisors (247889616).

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

129229104 is a wasteful number, since it uses less digits than its factorization.

129229104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227 (or 221 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 129229104 is about 11367.8979587257. The cubic root of 129229104 is about 505.5763820552.

The spelling of 129229104 in words is "one hundred twenty-nine million, two hundred twenty-nine thousand, one hundred four".