129041587 has 4 divisors (see below), whose sum is σ = 129096976. Its totient is φ = 128986200.

The previous prime is 129041579. The next prime is 129041629. The reversal of 129041587 is 785140921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 129041587 - 2³ = 129041579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129041527) 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 3 ways as a sum of consecutive naturals, for example, 24039 + ... + 28912.

It is an arithmetic number, because the mean of its divisors is an integer number (32274244).

Almost surely, 2^129041587 is an apocalyptic number.

129041587 is a deficient number, since it is larger than the sum of its proper divisors (55389).

129041587 is an equidigital number, since it uses as much as digits as its factorization.

129041587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55388.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 129041587 is about 11359.6473096659. The cubic root of 129041587 is about 505.3317259742.

The spelling of 129041587 in words is "one hundred twenty-nine million, forty-one thousand, five hundred eighty-seven".