1279125906 has 32 divisors (see below), whose sum is σ = 2645457408. Its totient is φ = 411889920.

The previous prime is 1279125901. The next prime is 1279125907. The reversal of 1279125906 is 6095219721.

1279125906 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1279125901) 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, 104500 + ... + 116096.

It is an arithmetic number, because the mean of its divisors is an integer number (82670544).

Almost surely, 2^1279125906 is an apocalyptic number.

1279125906 is an abundant number, since it is smaller than the sum of its proper divisors (1366331502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1279125906 is a wasteful number, since it uses less digits than its factorization.

1279125906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12226.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 1279125906 is about 35764.8697187617. The cubic root of 1279125906 is about 1085.5198386753.

The spelling of 1279125906 in words is "one billion, two hundred seventy-nine million, one hundred twenty-five thousand, nine hundred six".