129271219 has 8 divisors (see below), whose sum is σ = 161169408. Its totient is φ = 100730760.

The previous prime is 129271217. The next prime is 129271223. The reversal of 129271219 is 912172921.

It is a happy number.

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 129271219 - 2¹ = 129271217 is a prime.

It is a super-2 number, since 2×129271219² = 33422096123491922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129271211) 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, 839347 + ... + 839500.

It is an arithmetic number, because the mean of its divisors is an integer number (20146176).

Almost surely, 2^129271219 is an apocalyptic number.

129271219 is a deficient number, since it is larger than the sum of its proper divisors (31898189).

129271219 is a wasteful number, since it uses less digits than its factorization.

129271219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1678865.

The product of its digits is 4536, while the sum is 34.

The square root of 129271219 is about 11369.7501731568. The cubic root of 129271219 is about 505.6312975401.

The spelling of 129271219 in words is "one hundred twenty-nine million, two hundred seventy-one thousand, two hundred nineteen".