1279125289 has 16 divisors (see below), whose sum is σ = 1438803072. Its totient is φ = 1128302208.

The previous prime is 1279125283. The next prime is 1279125299. The reversal of 1279125289 is 9825219721.

It is a cyclic number.

It is not a de Polignac number, because 1279125289 - 2¹³ = 1279117097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1279125283) 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 15 ways as a sum of consecutive naturals, for example, 593037 + ... + 595189.

It is an arithmetic number, because the mean of its divisors is an integer number (89925192).

Almost surely, 2^1279125289 is an apocalyptic number.

It is an amenable number.

1279125289 is a deficient number, since it is larger than the sum of its proper divisors (159677783).

1279125289 is a wasteful number, since it uses less digits than its factorization.

1279125289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4176.

The product of its digits is 181440, while the sum is 46.

The square root of 1279125289 is about 35764.8610929778. The cubic root of 1279125289 is about 1085.5196641379.

The spelling of 1279125289 in words is "one billion, two hundred seventy-nine million, one hundred twenty-five thousand, two hundred eighty-nine".