129541398 has 48 divisors (see below), whose sum is σ = 302328000. Its totient is φ = 36895824.

The previous prime is 129541393. The next prime is 129541421. The reversal of 129541398 is 893145921.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129541393) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 146265 + ... + 147147.

It is an arithmetic number, because the mean of its divisors is an integer number (6298500).

Almost surely, 2^129541398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129541398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151164000).

129541398 is an abundant number, since it is smaller than the sum of its proper divisors (172786602).

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

129541398 is a wasteful number, since it uses less digits than its factorization.

129541398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401 (or 1394 counting only the distinct ones).

The product of its digits is 77760, while the sum is 42.

The square root of 129541398 is about 11381.6254550921. The cubic root of 129541398 is about 505.9833116922.

The spelling of 129541398 in words is "one hundred twenty-nine million, five hundred forty-one thousand, three hundred ninety-eight".