13250565 has 24 divisors (see below), whose sum is σ = 24320088. Its totient is φ = 6650880.

The previous prime is 13250563. The next prime is 13250621. The reversal of 13250565 is 56505231.

It can be written as a sum of positive squares in 4 ways, for example, as 1595169 + 11655396 = 1263^2 + 3414^2 .

It is not a de Polignac number, because 13250565 - 2¹ = 13250563 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13250563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7896 + ... + 9425.

It is an arithmetic number, because the mean of its divisors is an integer number (1013337).

Almost surely, 2^13250565 is an apocalyptic number.

13250565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13250565 is a deficient number, since it is larger than the sum of its proper divisors (11069523).

13250565 is a wasteful number, since it uses less digits than its factorization.

13250565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17349 (or 17346 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 13250565 is about 3640.1325525316. The cubic root of 13250565 is about 236.6345379472.

Adding to 13250565 its reverse (56505231), we get a palindrome (69755796).

The spelling of 13250565 in words is "thirteen million, two hundred fifty thousand, five hundred sixty-five".