129919275 has 48 divisors (see below), whose sum is σ = 246933600. Its totient is φ = 66890880.

The previous prime is 129919267. The next prime is 129919289. The reversal of 129919275 is 572919921.

It is not a de Polignac number, because 129919275 - 2³ = 129919267 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 129919275.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 16257 + ... + 22893.

It is an arithmetic number, because the mean of its divisors is an integer number (5144450).

Almost surely, 2^129919275 is an apocalyptic number.

129919275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

129919275 is a deficient number, since it is larger than the sum of its proper divisors (117014325).

129919275 is a wasteful number, since it uses less digits than its factorization.

129919275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6685 (or 6674 counting only the distinct ones).

The product of its digits is 102060, while the sum is 45.

The square root of 129919275 is about 11398.2136758353. The cubic root of 129919275 is about 506.4748246952.

The spelling of 129919275 in words is "one hundred twenty-nine million, nine hundred nineteen thousand, two hundred seventy-five".