1273258985 has 12 divisors (see below), whose sum is σ = 1570330188. Its totient is φ = 991071936.

The previous prime is 1273258969. The next prime is 1273258991. The reversal of 1273258985 is 5898523721.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 41319184 + 1231939801 = 6428^2 + 35099^2 .

It is not a de Polignac number, because 1273258985 - 2⁴ = 1273258969 is a prime.

It is a Duffinian 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 11 ways as a sum of consecutive naturals, for example, 86162 + ... + 99851.

It is an arithmetic number, because the mean of its divisors is an integer number (130860849).

Almost surely, 2^1273258985 is an apocalyptic number.

It is an amenable number.

1273258985 is a deficient number, since it is larger than the sum of its proper divisors (297071203).

1273258985 is an equidigital number, since it uses as much as digits as its factorization.

1273258985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186092 (or 186055 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 50.

The square root of 1273258985 is about 35682.7547282998. The cubic root of 1273258985 is about 1083.8576564612.

It can be divided in two parts, 12732 and 58985, that added together give a palindrome (71717).

The spelling of 1273258985 in words is "one billion, two hundred seventy-three million, two hundred fifty-eight thousand, nine hundred eighty-five".