129768465 has 8 divisors (see below), whose sum is σ = 207629568. Its totient is φ = 69209840.

The previous prime is 129768439. The next prime is 129768487. The reversal of 129768465 is 564867921.

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

It is a de Polignac number, because none of the positive numbers 2^k-129768465 is a prime.

It is an unprimeable number.

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, 4325601 + ... + 4325630.

It is an arithmetic number, because the mean of its divisors is an integer number (25953696).

Almost surely, 2^129768465 is an apocalyptic number.

129768465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129768465 is a deficient number, since it is larger than the sum of its proper divisors (77861103).

129768465 is an equidigital number, since it uses as much as digits as its factorization.

129768465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8651239.

The product of its digits is 725760, while the sum is 48.

The square root of 129768465 is about 11391.5962446007. The cubic root of 129768465 is about 506.2787772088.

The spelling of 129768465 in words is "one hundred twenty-nine million, seven hundred sixty-eight thousand, four hundred sixty-five".