129215005 has 8 divisors (see below), whose sum is σ = 155174400. Its totient is φ = 103294416.

The previous prime is 129215003. The next prime is 129215017. The reversal of 129215005 is 500512921.

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 129215005 - 2¹ = 129215003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129215003) 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, 1785 + ... + 16174.

It is an arithmetic number, because the mean of its divisors is an integer number (19396800).

Almost surely, 2^129215005 is an apocalyptic number.

It is an amenable number.

129215005 is a deficient number, since it is larger than the sum of its proper divisors (25959395).

129215005 is a wasteful number, since it uses less digits than its factorization.

129215005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19403.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 129215005 is about 11367.2778183697. The cubic root of 129215005 is about 505.5579951221.

Adding to 129215005 its reverse (500512921), we get a palindrome (629727926).

The spelling of 129215005 in words is "one hundred twenty-nine million, two hundred fifteen thousand, five".