1275172085 has 16 divisors (see below), whose sum is σ = 1674775872. Its totient is φ = 924364800.

The previous prime is 1275172051. The next prime is 1275172097. The reversal of 1275172085 is 5802715721.

It is not a de Polignac number, because 1275172085 - 2¹² = 1275167989 is a prime.

It is a Curzon number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 20876 + ... + 54645.

It is an arithmetic number, because the mean of its divisors is an integer number (104673492).

Almost surely, 2^1275172085 is an apocalyptic number.

It is an amenable number.

1275172085 is a deficient number, since it is larger than the sum of its proper divisors (399603787).

1275172085 is a wasteful number, since it uses less digits than its factorization.

1275172085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75844.

The product of its (nonzero) digits is 39200, while the sum is 38.

The square root of 1275172085 is about 35709.5517333948. The cubic root of 1275172085 is about 1084.4002249058.

The spelling of 1275172085 in words is "one billion, two hundred seventy-five million, one hundred seventy-two thousand, eighty-five".