129158406 has 24 divisors (see below), whose sum is σ = 301370160. Its totient is φ = 39740976.

The previous prime is 129158399. The next prime is 129158417. The reversal of 129158406 is 604851921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 275746 + ... + 276213.

It is an arithmetic number, because the mean of its divisors is an integer number (12557090).

Almost surely, 2^129158406 is an apocalyptic number.

129158406 is an abundant number, since it is smaller than the sum of its proper divisors (172211754).

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

129158406 is a wasteful number, since it uses less digits than its factorization.

129158406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551980 (or 551977 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 129158406 is about 11364.7879874637. The cubic root of 129158406 is about 505.4841691867.

It can be divided in two parts, 12915 and 8406, that added together give a triangular number (21321 = T₂₀₆).

The spelling of 129158406 in words is "one hundred twenty-nine million, one hundred fifty-eight thousand, four hundred six".