129149541 has 12 divisors (see below), whose sum is σ = 186658732. Its totient is φ = 86049216.

The previous prime is 129149539. The next prime is 129149563. The reversal of 129149541 is 145941921.

It is a happy number.

129149541 is a `hidden beast` number, since 129 + 1 + 495 + 41 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 37564641 + 91584900 = 6129^2 + 9570^2 .

It is not a de Polignac number, because 129149541 - 2¹ = 129149539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129149496 and 129149505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129149341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18375 + ... + 24411.

Almost surely, 2^129149541 is an apocalyptic number.

It is an amenable number.

129149541 is a deficient number, since it is larger than the sum of its proper divisors (57509191).

129149541 is a wasteful number, since it uses less digits than its factorization.

129149541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8420 (or 8417 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 129149541 is about 11364.3979602969. The cubic root of 129149541 is about 505.4726040091.

The spelling of 129149541 in words is "one hundred twenty-nine million, one hundred forty-nine thousand, five hundred forty-one".