129128014 has 8 divisors (see below), whose sum is σ = 193773888. Its totient is φ = 64536720.

The previous prime is 129127987. The next prime is 129128057. The reversal of 129128014 is 410821921.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7102 + ... + 17569.

It is an arithmetic number, because the mean of its divisors is an integer number (24221736).

Almost surely, 2^129128014 is an apocalyptic number.

129128014 is a deficient number, since it is larger than the sum of its proper divisors (64645874).

129128014 is a wasteful number, since it uses less digits than its factorization.

129128014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27290.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 129128014 is about 11363.4507963030. The cubic root of 129128014 is about 505.4445179282. Note that the first 3 decimals are identical.

Adding to 129128014 its reverse (410821921), we get a palindrome (539949935).

The spelling of 129128014 in words is "one hundred twenty-nine million, one hundred twenty-eight thousand, fourteen".