129104215 has 8 divisors (see below), whose sum is σ = 155574720. Its totient is φ = 102850272.

The previous prime is 129104197. The next prime is 129104231. The reversal of 129104215 is 512401921.

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 129104215 - 2⁹ = 129103703 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129104215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52824 + ... + 55213.

It is an arithmetic number, because the mean of its divisors is an integer number (19446840).

Almost surely, 2^129104215 is an apocalyptic number.

129104215 is a deficient number, since it is larger than the sum of its proper divisors (26470505).

129104215 is a wasteful number, since it uses less digits than its factorization.

129104215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108281.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 129104215 is about 11362.4035749484. The cubic root of 129104215 is about 505.4134639563.

The spelling of 129104215 in words is "one hundred twenty-nine million, one hundred four thousand, two hundred fifteen".