1279872125 has 16 divisors (see below), whose sum is σ = 1825464576. Its totient is φ = 877626000.

The previous prime is 1279872119. The next prime is 1279872133. The reversal of 1279872125 is 5212789721.

It is not a de Polignac number, because 1279872125 - 2²⁰ = 1278823549 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 730481 + ... + 732230.

It is an arithmetic number, because the mean of its divisors is an integer number (114091536).

Almost surely, 2^1279872125 is an apocalyptic number.

It is an amenable number.

1279872125 is a deficient number, since it is larger than the sum of its proper divisors (545592451).

1279872125 is an equidigital number, since it uses as much as digits as its factorization.

1279872125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1462733 (or 1462723 counting only the distinct ones).

The product of its digits is 141120, while the sum is 44.

The square root of 1279872125 is about 35775.3004879065. The cubic root of 1279872125 is about 1085.7308885429.

The spelling of 1279872125 in words is "one billion, two hundred seventy-nine million, eight hundred seventy-two thousand, one hundred twenty-five".