265641 has 4 divisors (see below), whose sum is σ = 354192. Its totient is φ = 177092.

The previous prime is 265621. The next prime is 265703. The reversal of 265641 is 146562.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 265641 - 2⁷ = 265513 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (265621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44271 + ... + 44276.

It is an arithmetic number, because the mean of its divisors is an integer number (88548).

2²⁶⁵⁶⁴¹ is an apocalyptic number.

It is an amenable number.

265641 is a deficient number, since it is larger than the sum of its proper divisors (88551).

265641 is an equidigital number, since it uses as much as digits as its factorization.

265641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88550.

The product of its digits is 1440, while the sum is 24.

The square root of 265641 is about 515.4037252485. The cubic root of 265641 is about 64.2833304231.

It can be divided in two parts, 26564 and 1, that added together give a triangular number (26565 = T₂₃₀).

The spelling of 265641 in words is "two hundred sixty-five thousand, six hundred forty-one".