1279229871 has 16 divisors (see below), whose sum is σ = 1719083520. Its totient is φ = 846112800.

The previous prime is 1279229867. The next prime is 1279229899. The reversal of 1279229871 is 1789229721.

It is a happy number.

It is not a de Polignac number, because 1279229871 - 2² = 1279229867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1279229871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279229851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 552865 + ... + 555173.

It is an arithmetic number, because the mean of its divisors is an integer number (107442720).

Almost surely, 2^1279229871 is an apocalyptic number.

1279229871 is a deficient number, since it is larger than the sum of its proper divisors (439853649).

1279229871 is a wasteful number, since it uses less digits than its factorization.

1279229871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3686.

The product of its digits is 254016, while the sum is 48.

The square root of 1279229871 is about 35766.3231406305. The cubic root of 1279229871 is about 1085.5492475636.

The spelling of 1279229871 in words is "one billion, two hundred seventy-nine million, two hundred twenty-nine thousand, eight hundred seventy-one".