265633 has 4 divisors (see below), whose sum is σ = 268180. Its totient is φ = 263088.

The previous prime is 265621. The next prime is 265703. The reversal of 265633 is 336562.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 336562 = 2 ⋅168281.

It can be written as a sum of positive squares in 2 ways, for example, as 222784 + 42849 = 472^2 + 207^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265633 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 265598 and 265607.

It is not an unprimeable number, because it can be changed into a prime (265613) by changing a digit.

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, 1110 + ... + 1327.

It is an arithmetic number, because the mean of its divisors is an integer number (67045).

2²⁶⁵⁶³³ is an apocalyptic number.

It is an amenable number.

265633 is a deficient number, since it is larger than the sum of its proper divisors (2547).

265633 is a wasteful number, since it uses less digits than its factorization.

265633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2546.

The product of its digits is 3240, while the sum is 25.

The square root of 265633 is about 515.3959642838. The cubic root of 265633 is about 64.2826851012.

It can be divided in two parts, 265 and 633, that added together give a palindrome (898).

The spelling of 265633 in words is "two hundred sixty-five thousand, six hundred thirty-three".