1279971012 has 24 divisors (see below), whose sum is σ = 2988812736. Its totient is φ = 426340768.

The previous prime is 1279970963. The next prime is 1279971023. The reversal of 1279971012 is 2101799721.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22368 + ... + 55319.

It is an arithmetic number, because the mean of its divisors is an integer number (124533864).

Almost surely, 2^1279971012 is an apocalyptic number.

1279971012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1279971012 is an abundant number, since it is smaller than the sum of its proper divisors (1708841724).

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

1279971012 is a wasteful number, since it uses less digits than its factorization.

1279971012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79067 (or 79065 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 39.

The square root of 1279971012 is about 35776.6825180871. The cubic root of 1279971012 is about 1085.7588501659.

The spelling of 1279971012 in words is "one billion, two hundred seventy-nine million, nine hundred seventy-one thousand, twelve".