265813 has 2 divisors, whose sum is σ = 265814. Its totient is φ = 265812.

The previous prime is 265807. The next prime is 265819. The reversal of 265813 is 318562.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (265807) and next prime (265819).

It can be written as a sum of positive squares in only one way, i.e., 232324 + 33489 = 482^2 + 183^2 .

It is a cyclic number.

It is not a de Polignac number, because 265813 - 2⁵ = 265781 is a prime.

It is a plaindrome in base 9.

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 265813.

It is not a weakly prime, because it can be changed into another prime (265819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132906 + 132907.

It is an arithmetic number, because the mean of its divisors is an integer number (132907).

2²⁶⁵⁸¹³ is an apocalyptic number.

It is an amenable number.

265813 is a deficient number, since it is larger than the sum of its proper divisors (1).

265813 is an equidigital number, since it uses as much as digits as its factorization.

265813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 25.

The square root of 265813 is about 515.5705577319. The cubic root of 265813 is about 64.2972017096.

The spelling of 265813 in words is "two hundred sixty-five thousand, eight hundred thirteen".