265541 has 2 divisors, whose sum is σ = 265542. Its totient is φ = 265540.

The previous prime is 265513. The next prime is 265543. The reversal of 265541 is 145562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 229441 + 36100 = 479^2 + 190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265541 is a prime.

Together with 265543, it forms a pair of twin primes.

It is a Chen prime.

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 265541.

It is not a weakly prime, because it can be changed into another prime (265543) 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 as a sum of consecutive naturals, namely, 132770 + 132771.

It is an arithmetic number, because the mean of its divisors is an integer number (132771).

2²⁶⁵⁵⁴¹ is an apocalyptic number.

It is an amenable number.

265541 is a deficient number, since it is larger than the sum of its proper divisors (1).

265541 is an equidigital number, since it uses as much as digits as its factorization.

265541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1200, while the sum is 23.

The square root of 265541 is about 515.3067047885. The cubic root of 265541 is about 64.2752629688.

The spelling of 265541 in words is "two hundred sixty-five thousand, five hundred forty-one".