129180043 has 4 divisors (see below), whose sum is σ = 129282480. Its totient is φ = 129077608.

The previous prime is 129180013. The next prime is 129180049. The reversal of 129180043 is 340081921.

It is a happy number.

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 129180043 - 2²⁵ = 95625611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129179993 and 129180020.

It is not an unprimeable number, because it can be changed into a prime (129180049) 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, 49303 + ... + 51856.

It is an arithmetic number, because the mean of its divisors is an integer number (32320620).

Almost surely, 2^129180043 is an apocalyptic number.

129180043 is a deficient number, since it is larger than the sum of its proper divisors (102437).

129180043 is a wasteful number, since it uses less digits than its factorization.

129180043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102436.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 129180043 is about 11365.7398791280. The cubic root of 129180043 is about 505.5123943474.

The spelling of 129180043 in words is "one hundred twenty-nine million, one hundred eighty thousand, forty-three".