1279207120 has 20 divisors (see below), whose sum is σ = 2974156740. Its totient is φ = 511682816.

The previous prime is 1279207087. The next prime is 1279207187. The reversal of 1279207120 is 217029721.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 828748944 + 450458176 = 28788^2 + 21224^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7994965 + ... + 7995124.

It is an arithmetic number, because the mean of its divisors is an integer number (148707837).

Almost surely, 2^1279207120 is an apocalyptic number.

1279207120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1279207120 is an abundant number, since it is smaller than the sum of its proper divisors (1694949620).

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

1279207120 is a wasteful number, since it uses less digits than its factorization.

1279207120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15990102 (or 15990096 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 1279207120 is about 35766.0050886313. The cubic root of 1279207120 is about 1085.5428120568.

The spelling of 1279207120 in words is "one billion, two hundred seventy-nine million, two hundred seven thousand, one hundred twenty".