129966515 has 36 divisors (see below), whose sum is σ = 186662928. Its totient is φ = 85096320.

The previous prime is 129966493. The next prime is 129966559. The reversal of 129966515 is 515669921.

It is not a de Polignac number, because 129966515 - 2²⁰ = 128917939 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

Its product of digits (145800) is a multiple of the sum of its prime divisors (100).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2765222 + ... + 2765268.

Almost surely, 2^129966515 is an apocalyptic number.

129966515 is a deficient number, since it is larger than the sum of its proper divisors (56696413).

129966515 is an frugal number, since it uses more digits than its factorization.

129966515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188 (or 100 counting only the distinct ones).

The product of its digits is 145800, while the sum is 44.

The square root of 129966515 is about 11400.2857420330. The cubic root of 129966515 is about 506.5362037615.

The spelling of 129966515 in words is "one hundred twenty-nine million, nine hundred sixty-six thousand, five hundred fifteen".