129039541 has 6 divisors (see below), whose sum is σ = 130246242. Its totient is φ = 127843920.

The previous prime is 129039529. The next prime is 129039551. The reversal of 129039541 is 145930921.

It can be written as a sum of positive squares in 3 ways, for example, as 34269316 + 94770225 = 5854^2 + 9735^2 .

It is not a de Polignac number, because 129039541 - 2⁵ = 129039509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129039497 and 129039506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129039511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6451 + ... + 17311.

It is an arithmetic number, because the mean of its divisors is an integer number (21707707).

Almost surely, 2^129039541 is an apocalyptic number.

It is an amenable number.

129039541 is a deficient number, since it is larger than the sum of its proper divisors (1206701).

129039541 is an equidigital number, since it uses as much as digits as its factorization.

129039541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11079 (or 10970 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 129039541 is about 11359.5572536961. The cubic root of 129039541 is about 505.3290552223.

The spelling of 129039541 in words is "one hundred twenty-nine million, thirty-nine thousand, five hundred forty-one".