13561265 has 4 divisors (see below), whose sum is σ = 16273524. Its totient is φ = 10849008.

The previous prime is 13561259. The next prime is 13561271. The reversal of 13561265 is 56216531.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (13561259) and next prime (13561271).

It can be written as a sum of positive squares in 2 ways, for example, as 2598544 + 10962721 = 1612^2 + 3311^2 .

It is a cyclic number.

It is not a de Polignac number, because 13561265 - 2²² = 9366961 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1356122 + ... + 1356131.

It is an arithmetic number, because the mean of its divisors is an integer number (4068381).

Almost surely, 2^13561265 is an apocalyptic number.

It is an amenable number.

13561265 is a deficient number, since it is larger than the sum of its proper divisors (2712259).

13561265 is an equidigital number, since it uses as much as digits as its factorization.

13561265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2712258.

The product of its digits is 5400, while the sum is 29.

The square root of 13561265 is about 3682.5622873212. The cubic root of 13561265 is about 238.4698073522.

Adding to 13561265 its reverse (56216531), we get a palindrome (69777796).

The spelling of 13561265 in words is "thirteen million, five hundred sixty-one thousand, two hundred sixty-five".