1275265563 has 32 divisors (see below), whose sum is σ = 1999979520. Its totient is φ = 712592640.

The previous prime is 1275265559. The next prime is 1275265601. The reversal of 1275265563 is 3655625721.

It is not a de Polignac number, because 1275265563 - 2² = 1275265559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1275265363) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 609423 + ... + 611511.

It is an arithmetic number, because the mean of its divisors is an integer number (62499360).

Almost surely, 2^1275265563 is an apocalyptic number.

1275265563 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1275265563 is a deficient number, since it is larger than the sum of its proper divisors (724713957).

1275265563 is a wasteful number, since it uses less digits than its factorization.

1275265563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3539.

The product of its digits is 378000, while the sum is 42.

The square root of 1275265563 is about 35710.8605749007. The cubic root of 1275265563 is about 1084.4267220059.

The spelling of 1275265563 in words is "one billion, two hundred seventy-five million, two hundred sixty-five thousand, five hundred sixty-three".