129140082 has 20 divisors (see below), whose sum is σ = 289369806. Its totient is φ = 43046640.

The previous prime is 129140069. The next prime is 129140083. The reversal of 129140082 is 280041921.

It can be written as a sum of positive squares in only one way, i.e., 122744241 + 6395841 = 11079^2 + 2529^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 3.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (129140083) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 398419 + ... + 398742.

Almost surely, 2^129140082 is an apocalyptic number.

129140082 is an abundant number, since it is smaller than the sum of its proper divisors (160229724).

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

129140082 is an equidigital number, since it uses as much as digits as its factorization.

129140082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797175 (or 797166 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 129140082 is about 11363.9817845683. The cubic root of 129140082 is about 505.4602633224.

The spelling of 129140082 in words is "one hundred twenty-nine million, one hundred forty thousand, eighty-two".