129286371 has 4 divisors (see below), whose sum is σ = 172381832. Its totient is φ = 86190912.

The previous prime is 129286357. The next prime is 129286403. The reversal of 129286371 is 173682921.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 129286371 - 2⁶ = 129286307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129286271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21547726 + ... + 21547731.

It is an arithmetic number, because the mean of its divisors is an integer number (43095458).

Almost surely, 2^129286371 is an apocalyptic number.

129286371 is a deficient number, since it is larger than the sum of its proper divisors (43095461).

129286371 is an equidigital number, since it uses as much as digits as its factorization.

129286371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43095460.

The product of its digits is 36288, while the sum is 39.

The square root of 129286371 is about 11370.4164831373. The cubic root of 129286371 is about 505.6510519401.

The spelling of 129286371 in words is "one hundred twenty-nine million, two hundred eighty-six thousand, three hundred seventy-one".