1279126225 has 24 divisors (see below), whose sum is σ = 1711374840. Its totient is φ = 942789120.

The previous prime is 1279126217. The next prime is 1279126253. The reversal of 1279126225 is 5226219721.

It can be written as a sum of positive squares in 12 ways, for example, as 707772816 + 571353409 = 26604^2 + 23903^2 .

It is not a de Polignac number, because 1279126225 - 2³ = 1279126217 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 181467 + ... + 188383.

It is an arithmetic number, because the mean of its divisors is an integer number (71307285).

Almost surely, 2^1279126225 is an apocalyptic number.

It is an amenable number.

1279126225 is a deficient number, since it is larger than the sum of its proper divisors (432248615).

1279126225 is a wasteful number, since it uses less digits than its factorization.

1279126225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7509 (or 7504 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 1279126225 is about 35764.8741784450. The cubic root of 1279126225 is about 1085.5199289142.

The spelling of 1279126225 in words is "one billion, two hundred seventy-nine million, one hundred twenty-six thousand, two hundred twenty-five".