1275405125 has 8 divisors (see below), whose sum is σ = 1591705752. Its totient is φ = 1020324000.

The previous prime is 1275405101. The next prime is 1275405137. The reversal of 1275405125 is 5215045721.

It can be written as a sum of positive squares in 4 ways, for example, as 23872996 + 1251532129 = 4886^2 + 35377^2 .

It is not a de Polignac number, because 1275405125 - 2⁸ = 1275404869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1275405091 and 1275405100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5101496 + ... + 5101745.

It is an arithmetic number, because the mean of its divisors is an integer number (198963219).

Almost surely, 2^1275405125 is an apocalyptic number.

It is an amenable number.

1275405125 is a deficient number, since it is larger than the sum of its proper divisors (316300627).

1275405125 is an equidigital number, since it uses as much as digits as its factorization.

1275405125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10203256 (or 10203246 counting only the distinct ones).

The product of its (nonzero) digits is 14000, while the sum is 32.

The square root of 1275405125 is about 35712.8145768434. The cubic root of 1275405125 is about 1084.4662795815.

The spelling of 1275405125 in words is "one billion, two hundred seventy-five million, four hundred five thousand, one hundred twenty-five".