1305172329 has 32 divisors (see below), whose sum is σ = 1875882240. Its totient is φ = 805229568.

The previous prime is 1305172327. The next prime is 1305172367. The reversal of 1305172329 is 9232715031.

It is not a de Polignac number, because 1305172329 - 2¹ = 1305172327 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1305172329.

It is not an unprimeable number, because it can be changed into a prime (1305172327) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 264517 + ... + 269405.

It is an arithmetic number, because the mean of its divisors is an integer number (58621320).

Almost surely, 2^1305172329 is an apocalyptic number.

It is an amenable number.

1305172329 is a deficient number, since it is larger than the sum of its proper divisors (570709911).

1305172329 is a wasteful number, since it uses less digits than its factorization.

1305172329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5041.

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 1305172329 is about 36127.1688483889. The cubic root of 1305172329 is about 1092.8384145720.

The spelling of 1305172329 in words is "one billion, three hundred five million, one hundred seventy-two thousand, three hundred twenty-nine".