265945 has 4 divisors (see below), whose sum is σ = 319140. Its totient is φ = 212752.

The previous prime is 265921. The next prime is 265957. The reversal of 265945 is 549562.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 196249 + 69696 = 443^2 + 264^2 .

It is a cyclic number.

It is not a de Polignac number, because 265945 - 2¹⁷ = 134873 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

265945 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26590 + ... + 26599.

It is an arithmetic number, because the mean of its divisors is an integer number (79785).

2²⁶⁵⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

265945 is a deficient number, since it is larger than the sum of its proper divisors (53195).

265945 is an equidigital number, since it uses as much as digits as its factorization.

265945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53194.

The product of its digits is 10800, while the sum is 31.

The square root of 265945 is about 515.6985553596. The cubic root of 265945 is about 64.3078430579.

It can be divided in two parts, 2659 and 45, that added together give a square (2704 = 52²).

The spelling of 265945 in words is "two hundred sixty-five thousand, nine hundred forty-five".