265556 has 12 divisors (see below), whose sum is σ = 468468. Its totient is φ = 131712.

The previous prime is 265547. The next prime is 265561. The reversal of 265556 is 655562.

It can be written as a sum of positive squares in 2 ways, for example, as 184900 + 80656 = 430^2 + 284^2 .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 265556.

It is an unprimeable number.

265556 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 620 + ... + 956.

It is an arithmetic number, because the mean of its divisors is an integer number (39039).

2²⁶⁵⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

265556 is a deficient number, since it is larger than the sum of its proper divisors (202912).

265556 is a wasteful number, since it uses less digits than its factorization.

265556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538 (or 536 counting only the distinct ones).

The product of its digits is 9000, while the sum is 29.

The square root of 265556 is about 515.3212590220. The cubic root of 265556 is about 64.2764732160.

It can be divided in two parts, 26555 and 6, that multiplied together give a triangular number (159330 = T₅₆₄).

The spelling of 265556 in words is "two hundred sixty-five thousand, five hundred fifty-six".