129087043 has 4 divisors (see below), whose sum is σ = 132575920. Its totient is φ = 125598168.

The previous prime is 129087037. The next prime is 129087061. The reversal of 129087043 is 340780921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 340780921 = 13 ⋅26213917.

It is a cyclic number.

It is not a de Polignac number, because 129087043 - 2⁵ = 129087011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129087143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1744383 + ... + 1744456.

It is an arithmetic number, because the mean of its divisors is an integer number (33143980).

Almost surely, 2^129087043 is an apocalyptic number.

129087043 is a deficient number, since it is larger than the sum of its proper divisors (3488877).

129087043 is an equidigital number, since it uses as much as digits as its factorization.

129087043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3488876.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 129087043 is about 11361.6478998427. The cubic root of 129087043 is about 505.3910548123.

The spelling of 129087043 in words is "one hundred twenty-nine million, eighty-seven thousand, forty-three".