129615105 has 8 divisors (see below), whose sum is σ = 207384192. Its totient is φ = 69128048.

The previous prime is 129615103. The next prime is 129615113. The reversal of 129615105 is 501516921.

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 129615105 - 2¹ = 129615103 is a prime.

It is a super-2 number, since 2×129615105² = 33600150888322050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129615103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4320489 + ... + 4320518.

It is an arithmetic number, because the mean of its divisors is an integer number (25923024).

Almost surely, 2^129615105 is an apocalyptic number.

129615105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129615105 is a deficient number, since it is larger than the sum of its proper divisors (77769087).

129615105 is an equidigital number, since it uses as much as digits as its factorization.

129615105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8641015.

The product of its (nonzero) digits is 2700, while the sum is 30.

The square root of 129615105 is about 11384.8629767775. The cubic root of 129615105 is about 506.0792589889.

The spelling of 129615105 in words is "one hundred twenty-nine million, six hundred fifteen thousand, one hundred five".