1275142842 has 12 divisors (see below), whose sum is σ = 2762809530. Its totient is φ = 425047608.

The previous prime is 1275142829. The next prime is 1275142849. The reversal of 1275142842 is 2482415721.

It can be written as a sum of positive squares in only one way, i.e., 939483801 + 335659041 = 30651^2 + 18321^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1275142797 and 1275142806.

It is not an unprimeable number, because it can be changed into a prime (1275142849) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 35420617 + ... + 35420652.

Almost surely, 2^1275142842 is an apocalyptic number.

1275142842 is an abundant number, since it is smaller than the sum of its proper divisors (1487666688).

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

1275142842 is a wasteful number, since it uses less digits than its factorization.

1275142842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70841277 (or 70841274 counting only the distinct ones).

The product of its digits is 35840, while the sum is 36.

The square root of 1275142842 is about 35709.1422747733. The cubic root of 1275142842 is about 1084.3919354734.

The spelling of 1275142842 in words is "one billion, two hundred seventy-five million, one hundred forty-two thousand, eight hundred forty-two".