1275808673 has 6 divisors (see below), whose sum is σ = 1351012194. Its totient is φ = 1200622496.

The previous prime is 1275808631. The next prime is 1275808679. The reversal of 1275808673 is 3768085721.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1200761104 + 75047569 = 34652^2 + 8663^2 .

It is not a de Polignac number, because 1275808673 - 2⁶ = 1275808609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1275808679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 142940 + ... + 151602.

It is an arithmetic number, because the mean of its divisors is an integer number (225168699).

Almost surely, 2^1275808673 is an apocalyptic number.

It is an amenable number.

1275808673 is a deficient number, since it is larger than the sum of its proper divisors (75203521).

1275808673 is an frugal number, since it uses more digits than its factorization.

1275808673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17343 (or 8680 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 47.

The square root of 1275808673 is about 35718.4640347258. The cubic root of 1275808673 is about 1084.5806453467.

The spelling of 1275808673 in words is "one billion, two hundred seventy-five million, eight hundred eight thousand, six hundred seventy-three".