129381141 has 16 divisors (see below), whose sum is σ = 180319104. Its totient is φ = 82361664.

The previous prime is 129381139. The next prime is 129381149. The reversal of 129381141 is 141183921.

It is not a de Polignac number, because 129381141 - 2¹ = 129381139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129381099 and 129381108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129381149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50995 + ... + 53471.

It is an arithmetic number, because the mean of its divisors is an integer number (11269944).

Almost surely, 2^129381141 is an apocalyptic number.

It is an amenable number.

129381141 is a deficient number, since it is larger than the sum of its proper divisors (50937963).

129381141 is a wasteful number, since it uses less digits than its factorization.

129381141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3260.

The product of its digits is 1728, while the sum is 30.

The square root of 129381141 is about 11374.5831132398. The cubic root of 129381141 is about 505.7745731992.

The spelling of 129381141 in words is "one hundred twenty-nine million, three hundred eighty-one thousand, one hundred forty-one".