129401316 has 144 divisors (see below), whose sum is σ = 375717888. Its totient is φ = 37195200.

The previous prime is 129401309. The next prime is 129401323. The reversal of 129401316 is 613104921.

It is an interprime number because it is at equal distance from previous prime (129401309) and next prime (129401323).

It is a self number, because there is not a number n which added to its sum of digits gives 129401316.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1018845 + ... + 1018971.

It is an arithmetic number, because the mean of its divisors is an integer number (2609152).

Almost surely, 2^129401316 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 129401316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187858944).

129401316 is an abundant number, since it is smaller than the sum of its proper divisors (246316572).

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

129401316 is a wasteful number, since it uses less digits than its factorization.

129401316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262 (or 257 counting only the distinct ones).

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

The square root of 129401316 is about 11375.4699243592. The cubic root of 129401316 is about 505.8008610894.

The spelling of 129401316 in words is "one hundred twenty-nine million, four hundred one thousand, three hundred sixteen".