1275556285 has 16 divisors (see below), whose sum is σ = 1542855600. Its totient is φ = 1012350976.

The previous prime is 1275556273. The next prime is 1275556307. The reversal of 1275556285 is 5826555721.

It can be written as a sum of positive squares in 8 ways, for example, as 3992004 + 1271564281 = 1998^2 + 35659^2 .

It is a cyclic number.

It is not a de Polignac number, because 1275556285 - 2¹¹ = 1275554237 is a prime.

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, 381501 + ... + 384829.

It is an arithmetic number, because the mean of its divisors is an integer number (96428475).

Almost surely, 2^1275556285 is an apocalyptic number.

It is an amenable number.

1275556285 is a deficient number, since it is larger than the sum of its proper divisors (267299315).

1275556285 is a wasteful number, since it uses less digits than its factorization.

1275556285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3920.

The product of its digits is 840000, while the sum is 46.

The square root of 1275556285 is about 35714.9308413162. The cubic root of 1275556285 is about 1084.5091212490.

The spelling of 1275556285 in words is "one billion, two hundred seventy-five million, five hundred fifty-six thousand, two hundred eighty-five".