265513 has 2 divisors, whose sum is σ = 265514. Its totient is φ = 265512.

The previous prime is 265511. The next prime is 265541. The reversal of 265513 is 315562.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 257049 + 8464 = 507^2 + 92^2 .

It is a cyclic number.

It is not a de Polignac number, because 265513 - 2¹ = 265511 is a prime.

Together with 265511, it forms a pair of twin primes.

265513 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (265511) 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, 132756 + 132757.

It is an arithmetic number, because the mean of its divisors is an integer number (132757).

2²⁶⁵⁵¹³ is an apocalyptic number.

It is an amenable number.

265513 is a deficient number, since it is larger than the sum of its proper divisors (1).

265513 is an equidigital number, since it uses as much as digits as its factorization.

265513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 900, while the sum is 22.

The square root of 265513 is about 515.2795357862. The cubic root of 265513 is about 64.2730037187.

The spelling of 265513 in words is "two hundred sixty-five thousand, five hundred thirteen".