129141381 has 16 divisors (see below), whose sum is σ = 178055168. Its totient is φ = 83170800.

The previous prime is 129141377. The next prime is 129141407. The reversal of 129141381 is 183141921.

It is not a de Polignac number, because 129141381 - 2² = 129141377 is a prime.

It is a super-2 number, since 2×129141381² = 33354992573174322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129141301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83586 + ... + 85116.

It is an arithmetic number, because the mean of its divisors is an integer number (11128448).

Almost surely, 2^129141381 is an apocalyptic number.

It is an amenable number.

129141381 is a deficient number, since it is larger than the sum of its proper divisors (48913787).

129141381 is a wasteful number, since it uses less digits than its factorization.

129141381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2472.

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

The square root of 129141381 is about 11364.0389386872. The cubic root of 129141381 is about 505.4619580988.

The spelling of 129141381 in words is "one hundred twenty-nine million, one hundred forty-one thousand, three hundred eighty-one".