129329541 has 40 divisors (see below), whose sum is σ = 216510624. Its totient is φ = 76243680.

The previous prime is 129329471. The next prime is 129329567. The reversal of 129329541 is 145923921.

129329541 is a `hidden beast` number, since 1 + 2 + 93 + 29 + 541 = 666.

It is not a de Polignac number, because 129329541 - 2¹⁵ = 129296773 is a prime.

It is a super-2 number, since 2×129329541² = 33452260350541362, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129329496 and 129329505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129329441) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 31006 + ... + 34928.

Almost surely, 2^129329541 is an apocalyptic number.

129329541 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

129329541 is a deficient number, since it is larger than the sum of its proper divisors (87181083).

129329541 is a wasteful number, since it uses less digits than its factorization.

129329541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3983 (or 3974 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 129329541 is about 11372.3146720446. The cubic root of 129329541 is about 505.7073263088.

The spelling of 129329541 in words is "one hundred twenty-nine million, three hundred twenty-nine thousand, five hundred forty-one".