129217043 has 8 divisors (see below), whose sum is σ = 136176720. Its totient is φ = 122273280.

The previous prime is 129217031. The next prime is 129217063. The reversal of 129217043 is 340712921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129217043 - 2⁴ = 129217027 is a prime.

It is a super-3 number, since 3×129217043³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129216997 and 129217015.

It is not an unprimeable number, because it can be changed into a prime (129217003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15083 + ... + 22043.

It is an arithmetic number, because the mean of its divisors is an integer number (17022090).

Almost surely, 2^129217043 is an apocalyptic number.

129217043 is a deficient number, since it is larger than the sum of its proper divisors (6959677).

129217043 is an equidigital number, since it uses as much as digits as its factorization.

129217043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7957.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 129217043 is about 11367.3674612902. The cubic root of 129217043 is about 505.5606530224.

Adding to 129217043 its reverse (340712921), we get a palindrome (469929964).

The spelling of 129217043 in words is "one hundred twenty-nine million, two hundred seventeen thousand, forty-three".