1279140275 has 12 divisors (see below), whose sum is σ = 1812724752. Its totient is φ = 877124640.

The previous prime is 1279140257. The next prime is 1279140301. The reversal of 1279140275 is 5720419721.

It is a happy number.

It is not a de Polignac number, because 1279140275 - 2¹⁶ = 1279074739 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3654512 + ... + 3654861.

It is an arithmetic number, because the mean of its divisors is an integer number (151060396).

Almost surely, 2^1279140275 is an apocalyptic number.

1279140275 is a deficient number, since it is larger than the sum of its proper divisors (533584477).

1279140275 is an equidigital number, since it uses as much as digits as its factorization.

1279140275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7309390 (or 7309385 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 1279140275 is about 35765.0705996787. The cubic root of 1279140275 is about 1085.5239033719.

Adding to 1279140275 its reverse (5720419721), we get a palindrome (6999559996).

The spelling of 1279140275 in words is "one billion, two hundred seventy-nine million, one hundred forty thousand, two hundred seventy-five".