129542541 has 16 divisors (see below), whose sum is σ = 175718400. Its totient is φ = 84874608.

The previous prime is 129542519. The next prime is 129542549. The reversal of 129542541 is 145245921.

It is not a de Polignac number, because 129542541 - 2⁹ = 129542029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129542549) 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, 55500 + ... + 57786.

It is an arithmetic number, because the mean of its divisors is an integer number (10982400).

Almost surely, 2^129542541 is an apocalyptic number.

It is an amenable number.

129542541 is a deficient number, since it is larger than the sum of its proper divisors (46175859).

129542541 is a wasteful number, since it uses less digits than its factorization.

129542541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2608.

The product of its digits is 14400, while the sum is 33.

The square root of 129542541 is about 11381.6756674929. The cubic root of 129542541 is about 505.9847998579.

The spelling of 129542541 in words is "one hundred twenty-nine million, five hundred forty-two thousand, five hundred forty-one".