265563 has 12 divisors (see below), whose sum is σ = 404040. Its totient is φ = 167616.

The previous prime is 265561. The next prime is 265567. The reversal of 265563 is 365562.

265563 is a `hidden beast` number, since 2 + 655 + 6 + 3 = 666.

It is not a de Polignac number, because 265563 - 2¹ = 265561 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (265561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 606 + ... + 947.

It is an arithmetic number, because the mean of its divisors is an integer number (33670).

2²⁶⁵⁵⁶³ is an apocalyptic number.

265563 is a deficient number, since it is larger than the sum of its proper divisors (138477).

265563 is a wasteful number, since it uses less digits than its factorization.

265563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578 (or 1575 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 265563 is about 515.3280508569. The cubic root of 265563 is about 64.2770379825.

Subtracting 265563 from its reverse (365562), we obtain a palindrome (99999).

It can be divided in two parts, 265 and 563, that added together give a palindrome (828).

The spelling of 265563 in words is "two hundred sixty-five thousand, five hundred sixty-three".