1265875505 has 16 divisors (see below), whose sum is σ = 1610053200. Its totient is φ = 952154112.

The previous prime is 1265875439. The next prime is 1265875517. The reversal of 1265875505 is 5055785621.

It can be written as a sum of positive squares in 8 ways, for example, as 471932176 + 793943329 = 21724^2 + 28177^2 .

It is a cyclic number.

It is not a de Polignac number, because 1265875505 - 2⁸ = 1265875249 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82067 + ... + 96263.

It is an arithmetic number, because the mean of its divisors is an integer number (100628325).

Almost surely, 2^1265875505 is an apocalyptic number.

It is an amenable number.

1265875505 is a deficient number, since it is larger than the sum of its proper divisors (344177695).

1265875505 is a wasteful number, since it uses less digits than its factorization.

1265875505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15268.

The product of its (nonzero) digits is 420000, while the sum is 44.

The square root of 1265875505 is about 35579.1442420978. The cubic root of 1265875505 is about 1081.7585390924.

The spelling of 1265875505 in words is "one billion, two hundred sixty-five million, eight hundred seventy-five thousand, five hundred five".